`briefcase run` returns "Failed to create a default .NET runtime"

### Describe the bug

Hi,

Following your tutorial, it failed when I used the “briefcase.exe run” command.
The create and build commands didn't fail. I can also use the briefcase dev command with no problems.

```
ModuleNotFoundError: No module named '_cffi_backend'
```

```
RuntimeError: Failed to create a default .NET runtime, which would
have been "netfx" on this system. Either install a
compatible runtime or configure it explicitly via
`set_runtime` or the `PYTHONNET_*` environment variables
(see set_runtime_from_env).
```

briefcase run log

```
(venv_teamcolo) PS C:\Users\matth\Documents\Teamcolo\teamcolo> briefcase.exe run --log

[teamcolo] Starting app...
===========================================================================
Log started: 2022-12-25 12:41:36Z
PreInitializing Python runtime...
PythonHome: C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src
PYTHONPATH:
- C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\python39.zip
- C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src
- C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages
- C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app
Configure argc/argv...
Initializing Python runtime...
Running app module: teamcolo
---------------------------------------------------------------------------
Traceback (most recent call last):
File "\app_packages\pythonnet\__init__.py", line 73, in _create_runtime_from_spec
return clr_loader.get_netfx(**params)
File "\app_packages\clr_loader\__init__.py", line 146, in get_netfx
from .netfx import NetFx
File "\app_packages\clr_loader\netfx.py", line 5, in
from .ffi import ffi, load_netfx
File "\app_packages\clr_loader\ffi\__init__.py", line 11, in
ffi = cffi.FFI() # type: ignore
File "\app_packages\cffi\api.py", line 48, in __init__
import _cffi_backend as backend
ModuleNotFoundError: No module named '_cffi_backend'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "\app\teamcolo\__main__.py", line 4, in
main().main_loop()
File "\app\teamcolo\app.py", line 41, in main
return Teamcolo()
File "\app_packages\toga\app.py", line 278, in __init__
self.factory = get_platform_factory(factory)
File "\app_packages\toga\platform.py", line 55, in get_platform_factory
from toga_winforms import factory
File "\app_packages\toga_winforms\factory.py", line 1, in
from .app import App, MainWindow
File "\app_packages\toga_winforms\app.py", line 7, in
from .keys import toga_to_winforms_key
File "\app_packages\toga_winforms\keys.py", line 6, in
from .libs import WinForms
File "\app_packages\toga_winforms\libs\__init__.py", line 1, in
from .fonts import ( # noqa: F401
File "\app_packages\toga_winforms\libs\fonts.py", line 13, in
from .winforms import (
File "\app_packages\toga_winforms\libs\winforms.py", line 3, in
import clr
File "\app_packages\clr.py", line 6, in
load()
File "\app_packages\pythonnet\__init__.py", line 131, in load
set_runtime_from_env()
File "\app_packages\pythonnet\__init__.py", line 114, in set_runtime_from_env
runtime = _create_runtime_from_spec(spec)
File "\app_packages\pythonnet\__init__.py", line 82, in _create_runtime_from_spec
raise RuntimeError(
RuntimeError: Failed to create a default .NET runtime, which would
have been "netfx" on this system. Either install a
compatible runtime or configure it explicitly via
`set_runtime` or the `PYTHONNET_*` environment variables
(see set_runtime_from_env).

---------------------------------------------------------------------------
Application quit abnormally (Exit code -6)!
Traceback (most recent call last):
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\pythonnet\__init__.py", line 73, in _create_runtime_from_spec
return clr_loader.get_netfx(**params)
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\clr_loader\__init__.py", line 146, in get_netfx
from .netfx import NetFx
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\clr_loader\netfx.py", line 5, in
from .ffi import ffi, load_netfx
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\clr_loader\ffi\__init__.py", line 11, in
ffi = cffi.FFI() # type: ignore
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\cffi\api.py", line 48, in __init__
import _cffi_backend as backend
ModuleNotFoundError: No module named '_cffi_backend'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "runpy.py", line 197, in _run_module_as_main
File "runpy.py", line 87, in _run_code
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app\teamcolo\__main__.py", line 4, in
main().main_loop()
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app\teamcolo\app.py", line 41, in main
return Teamcolo()
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga\app.py", line 278, in __init__
self.factory = get_platform_factory(factory)
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga\platform.py", line 55, in get_platform_factory
from toga_winforms import factory
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga_winforms\factory.py", line 1, in
from .app import App, MainWindow
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga_winforms\app.py", line 7, in
from .keys import toga_to_winforms_key
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga_winforms\keys.py", line 6, in
from .libs import WinForms
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga_winforms\libs\__init__.py", line 1, in
from .fonts import ( # noqa: F401
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga_winforms\libs\fonts.py", line 13, in
from .winforms import (
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\toga_winforms\libs\winforms.py", line 3, in
import clr
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\clr.py", line 6, in
load()
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\pythonnet\__init__.py", line 131, in load
set_runtime_from_env()
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\pythonnet\__init__.py", line 114, in set_runtime_from_env
runtime = _create_runtime_from_spec(spec)
File "C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\app_packages\pythonnet\__init__.py", line 82, in _create_runtime_from_spec
raise RuntimeError(
RuntimeError: Failed to create a default .NET runtime, which would
have been "netfx" on this system. Either install a
compatible runtime or configure it explicitly via
`set_runtime` or the `PYTHONNET_*` environment variables
(see set_runtime_from_env).
```

After some research, I tried to install the cffi package (after uninstalling it) in the environment, but also outside.
It didn't solve the problem.

I don't know if some people have already had this issue.

If you need more information, please ask me.

### Steps to reproduce

1. Run the briefcase create command
2. Run the briefcase build command
3. Run the briefcase run command

### Expected behavior

No error returned.

### Screenshots

_No response_

### Environment

- Operating System: Windows-10-10.0.22621
- Python version: 3.9.8 (tags/v3.9.8:bb3fdcf, Nov 5 2021, 20:33:01) [MSC v.1929 32 bit (Intel)]
- Software versions:
- Briefcase: 0.3.11
- toga-core: 0.3.0.dev39
- toga-winforms: 0.3.0.dev39
- cffi: 1.15.1
- cryptography: 38.0.4
- paramiko: 2.12.0

### Logs

full briefcase run log

```
Date/Time: 2022-12-25 12:41:39
Command line: C:\Users\matth\Documents\Teamcolo\venv_teamcolo\Scripts\briefcase run --log

OS Release: Windows 10
OS Version: 10.0.22621
Architecture: AMD64
Platform: Windows-10-10.0.22621

Python exe: C:\Users\matth\Documents\Teamcolo\venv_teamcolo\Scripts\python.exe
Python version: 3.9.8 (tags/v3.9.8:bb3fdcf, Nov 5 2021, 20:33:01) [MSC v.1929 32 bit (Intel)]
Virtual env: True
Conda env: False

Briefcase: 0.3.11
Target platform: windows
Target format: app

Environment Variables:
ALLUSERSPROFILE=C:\ProgramData
APPDATA=C:\Users\matth\AppData\Roaming
CHROME_CRASHPAD_PIPE_NAME=\\.\pipe\crashpad_36524_SHCGTZXMAMZCACZV
CLION=D:\CLion 2019.2.4\bin;
COLORTERM=truecolor
COMMONPROGRAMFILES=C:\Program Files (x86)\Common Files
COMMONPROGRAMFILES(X86)=C:\Program Files (x86)\Common Files
COMMONPROGRAMW6432=C:\Program Files\Common Files
COMPUTERNAME=PC-MATTHIAS
COMSPEC=C:\WINDOWS\system32\cmd.exe
CONFIGSETROOT=C:\WINDOWS\ConfigSetRoot
DISQUE=D:\
DRIVERDATA=C:\Windows\System32\Drivers\DriverData
FPS_BROWSER_APP_PROFILE_STRING=Internet Explorer
FPS_BROWSER_USER_PROFILE_STRING=Default
GIT_ASKPASS=********************
HOMEDRIVE=C:
HOMEPATH=\Users\matth
LANG=fr_FR.UTF-8
LOCALAPPDATA=C:\Users\matth\AppData\Local
LOGONSERVER=\\PC-MATTHIAS
NUMBER_OF_PROCESSORS=12
ONEDRIVE=C:\Users\matth\OneDrive
ONEDRIVECONSUMER=C:\Users\matth\OneDrive
ORIGINAL_XDG_CURRENT_DESKTOP=undefined
OS=Windows_NT
PATH=C:\Users\matth\Documents\Teamcolo\venv_teamcolo\Scripts;C:\Program Files (x86)\Python39-32\Scripts\;C:\Program Files (x86)\Python39-32\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(R) Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;D:\Git\cmd;D:\Mingw-w64\mingw32\bin\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;D:\Matlab\runtime\win64;D:\Matlab\bin;D:\Matlab\polyspace\bin;C:\Program Files\Polyspace\R2019b\runtime\win64;C:\Program Files\Polyspace\R2019b\bin;C:\Program Files\Polyspace\R2019b\polyspace\bin;C:\Program Files\nodejs\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Git\cmd;C;C:\Program Files\usbipd-win\;C:\Program Files\PuTTY\;C:\Program Files\CMake\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Docker\Docker\resources\bin;C:\Users\matth\scoop\shims;C:\Program Files (x86)\GNU Arm Embedded Toolchain\10 2021.10\bin;C:\Users\matth\AppData\Local\Programs\Python\Python37-32\Scripts\;C:\Users\matth\AppData\Local\Programs\Python\Python37-32\;C:\Users\matth\AppData\Local\Microsoft\WindowsApps;D:\Microsoft VS Code\bin;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;D:\CLion 2019.2.4\bin;C:\Users\matth\AppData\Roaming\npm;C:\Users\matth\AppData\Local\GitHubDesktop\bin;C:\Program Files\Azure Data Studio\bin;C:\Users\matth\.dotnet\tools;C:\Users\matth\AppData\Local\Microsoft\WindowsApps;C:\Users\matth\.dotnet\tools
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW;.CPL
PICO_SDK_PATH=C:\Users\matth\OneDrive\Documents\Pico\pico-sdk
PROCESSOR_ARCHITECTURE=x86
PROCESSOR_ARCHITEW6432=AMD64
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 158 Stepping 10, GenuineIntel
PROCESSOR_LEVEL=6
PROCESSOR_REVISION=9e0a
PROGRAMDATA=C:\ProgramData
PROGRAMFILES=C:\Program Files (x86)
PROGRAMFILES(X86)=C:\Program Files (x86)
PROGRAMW6432=C:\Program Files
PSMODULEPATH=C:\Users\matth\Documents\WindowsPowerShell\Modules;C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\PowerShell\Modules\
PUBLIC=C:\Users\Public
SESSIONNAME=Console
SYSTEMDRIVE=C:
SYSTEMROOT=C:\WINDOWS
TEMP=C:\Users\matth\AppData\Local\Temp
TERM_PROGRAM=vscode
TERM_PROGRAM_VERSION=1.73.1
TMP=C:\Users\matth\AppData\Local\Temp
USERDOMAIN=PC-MATTHIAS
USERDOMAIN_ROAMINGPROFILE=PC-MATTHIAS
USERNAME=matth
USERPROFILE=C:\Users\matth
VBOX_MSI_INSTALL_PATH=C:\Program Files\Oracle\VirtualBox\
VIRTUAL_ENV=C:\Users\matth\Documents\Teamcolo\venv_teamcolo
VSCODE_GIT_ASKPASS_EXTRA_ARGS=********************
VSCODE_GIT_ASKPASS_MAIN=********************
VSCODE_GIT_ASKPASS_NODE=********************
VSCODE_GIT_IPC_HANDLE=\\.\pipe\vscode-git-3e2ea1f4c3-sock
WINDIR=C:\WINDOWS
ZES_ENABLE_SYSMAN=1
_OLD_VIRTUAL_PATH=C:\Program Files (x86)\Python39-32\Scripts\;C:\Program Files (x86)\Python39-32\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(R) Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;D:\Git\cmd;D:\Mingw-w64\mingw32\bin\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;D:\Matlab\runtime\win64;D:\Matlab\bin;D:\Matlab\polyspace\bin;C:\Program Files\Polyspace\R2019b\runtime\win64;C:\Program Files\Polyspace\R2019b\bin;C:\Program Files\Polyspace\R2019b\polyspace\bin;C:\Program Files\nodejs\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Git\cmd;C;C:\Program Files\usbipd-win\;C:\Program Files\PuTTY\;C:\Program Files\CMake\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Docker\Docker\resources\bin;C:\Users\matth\scoop\shims;C:\Program Files (x86)\GNU Arm Embedded Toolchain\10 2021.10\bin;C:\Users\matth\AppData\Local\Programs\Python\Python37-32\Scripts\;C:\Users\matth\AppData\Local\Programs\Python\Python37-32\;C:\Users\matth\AppData\Local\Microsoft\WindowsApps;D:\Microsoft VS Code\bin;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;D:\CLion 2019.2.4\bin;C:\Users\matth\AppData\Roaming\npm;C:\Users\matth\AppData\Local\GitHubDesktop\bin;C:\Program Files\Azure Data Studio\bin;C:\Users\matth\.dotnet\tools;C:\Users\matth\AppData\Local\Microsoft\WindowsApps;C:\Users\matth\.dotnet\tools

Briefcase Log:
[12:41:36] __init__.py:82
[teamcolo] Starting app... __init__.py:82
=========================================================================== __init__.py:85
subprocess.py:516
>>> Running Command: subprocess.py:517
>>> 'C:\Users\matth\Documents\Teamcolo\teamcolo\windows\app\Teamcolo\src\Teamcolo.exe' subprocess.py:518
>>> Working Directory: subprocess.py:525
>>> C:\Users\matth subprocess.py:526
[12:41:39] >>> Return code: 1 subprocess.py:553
__main__.py:27
Unable to start app teamcolo. __main__.py:28

╭─────────────────────────────────────────────────────────────────────── Traceback (most recent call last) ────────────────────────────────────────────────────────────────────────╮
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\platforms\windows\__init__.py:86 in run_app │
│ │
│ 83 │ │ try: │
│ 84 │ │ │ # Start streaming logs for the app. │
│ 85 │ │ │ self.logger.info("=" * 75) │
│ ❱ 86 │ │ │ self.tools.subprocess.run( │
│ 87 │ │ │ │ [os.fsdecode(self.binary_path(app))], │
│ 88 │ │ │ │ cwd=self.tools.home_path, │
│ 89 │ │ │ │ check=True, │
│ │
│ ╭─────────────────────────────────────── locals ───────────────────────────────────────╮ │
│ │ app = │ │
│ │ kwargs = {} │ │
│ │ self = │ │
│ ╰──────────────────────────────────────────────────────────────────────────────────────╯ │
│ │
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\integrations\subprocess.py:110 in inner │
│ │
│ 107 │ │ """ │
│ 108 │ │ # Just run the command if no dynamic elements are active │
│ 109 │ │ if not sub.tools.input.is_console_controlled: │
│ ❱ 110 │ │ │ return sub_method(sub, args, **kwargs) │
│ 111 │ │ │
│ 112 │ │ remove_dynamic_elements = False │
│ 113 │
│ │
│ ╭────────────────────────────────────────────────── locals ───────────────────────────────────────────────────╮ │
│ │ args = ['C:\\Users\\matth\\Documents\\Teamcolo\\teamcolo\\windows\\app\\Teamcolo\\src\\Teamcolo.exe'] │ │
│ │ kwargs = {'cwd': WindowsPath('C:/Users/matth'), 'check': True, 'stream_output': True} │ │
│ │ sub = │ │
│ │ sub_method = │ │
│ ╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────╯ │
│ │
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\integrations\subprocess.py:284 in run │
│ │
│ 281 │ │ if stream_output or ( │
│ 282 │ │ │ self.tools.input.is_console_controlled and not is_output_redirected │
│ 283 │ │ ): │
│ ❱ 284 │ │ │ return self._run_and_stream_output(args, **kwargs) │
│ 285 │ │ │
│ 286 │ │ # Otherwise, invoke run() normally. │
│ 287 │ │ self._log_command(args) │
│ │
│ ╭─────────────────────────────────────────────────────── locals ────────────────────────────────────────────────────────╮ │
│ │ args = ['C:\\Users\\matth\\Documents\\Teamcolo\\teamcolo\\windows\\app\\Teamcolo\\src\\Teamcolo.exe'] │ │
│ │ is_output_redirected = None │ │
│ │ kwargs = {'cwd': WindowsPath('C:/Users/matth'), 'check': True} │ │
│ │ self = │ │
│ │ stream_output = True │ │
│ ╰───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯ │
│ │
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\integrations\subprocess.py:350 in _run_and_stream_output │
│ │
│ 347 │ │ self._log_return_code(return_code) │
│ 348 │ │ │
│ 349 │ │ if check and return_code: │
│ ❱ 350 │ │ │ raise subprocess.CalledProcessError(return_code, args, stderr=stderr) │
│ 351 │ │ │
│ 352 │ │ return subprocess.CompletedProcess(args, return_code, stderr=stderr) │
│ 353 │
│ │
│ ╭─────────────────────────────────────────────────── locals ───────────────────────────────────────────────────╮ │
│ │ args = ['C:\\Users\\matth\\Documents\\Teamcolo\\teamcolo\\windows\\app\\Teamcolo\\src\\Teamcolo.exe'] │ │
│ │ check = True │ │
│ │ kwargs = {'cwd': WindowsPath('C:/Users/matth'), 'stdout': -1, 'stderr': -2, 'bufsize': 1} │ │
│ │ process = │ │
│ │ return_code = 1 │ │
│ │ self = │ │
│ │ stderr = None │ │
│ ╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────╯ │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
CalledProcessError: Command '['C:\\Users\\matth\\Documents\\Teamcolo\\teamcolo\\windows\\app\\Teamcolo\\src\\Teamcolo.exe']' returned non-zero exit status 1.

The above exception was the direct cause of the following exception:

╭─────────────────────────────────────────────────────────────────────── Traceback (most recent call last) ────────────────────────────────────────────────────────────────────────╮
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\__main__.py:21 in main │
│ │
│ 18 │ │ options = command.parse_options(extra=extra_cmdline) │
│ 19 │ │ command.check_obsolete_data_dir() │
│ 20 │ │ command.parse_config(Path.cwd() / "pyproject.toml") │
│ ❱ 21 │ │ command(**options) │
│ 22 │ except HelpText as e: │
│ 23 │ │ logger.info() │
│ 24 │ │ logger.info(str(e)) │
│ │
│ ╭────────────────────────────────────────── locals ───────────────────────────────────────────╮ │
│ │ command = │ │
│ │ Command = │ │
│ │ console = │ │
│ │ e = BriefcaseCommandError('Unable to start app teamcolo.') │ │
│ │ extra_cmdline = ['--log'] │ │
│ │ logger = │ │
│ │ options = {'appname': None, 'update': False} │ │
│ │ result = 200 │ │
│ ╰─────────────────────────────────────────────────────────────────────────────────────────────╯ │
│ │
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\commands\run.py:68 in __call__ │
│ │
│ 65 │ │ │
│ 66 │ │ self.verify_app_tools(app) │
│ 67 │ │ │
│ ❱ 68 │ │ state = self.run_app(app, **full_options(state, options)) │
│ 69 │ │ │
│ 70 │ │ return state │
│ 71 │
│ │
│ ╭──────────────────────────────────────────────────── locals ─────────────────────────────────────────────────────╮ │
│ │ app = │ │
│ │ appname = None │ │
│ │ binary_file = WindowsPath('C:/Users/matth/Documents/Teamcolo/teamcolo/windows/app/Teamcolo/src/Teamcolo.exe') │ │
│ │ options = {} │ │
│ │ self = │ │
│ │ state = None │ │
│ │ template_file = WindowsPath('C:/Users/matth/Documents/Teamcolo/teamcolo/windows/app/Teamcolo') │ │
│ │ update = False │ │
│ ╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯ │
│ │
│ C:\Users\matth\Documents\Teamcolo\venv_teamcolo\lib\site-packages\briefcase\platforms\windows\__init__.py:93 in run_app │
│ │
│ 90 │ │ │ │ stream_output=True, │
│ 91 │ │ │ ) │
│ 92 │ │ except subprocess.CalledProcessError as e: │
│ ❱ 93 │ │ │ raise BriefcaseCommandError(f"Unable to start app {app.app_name}.") from e │
│ 94 │
│ 95 │
│ 96 class WindowsPackageCommand(PackageCommand): │
│ │
│ ╭─────────────────────────────────────── locals ───────────────────────────────────────╮ │
│ │ app = │ │
│ │ kwargs = {} │ │
│ │ self = │ │
│ ╰──────────────────────────────────────────────────────────────────────────────────────╯ │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
BriefcaseCommandError: Unable to start app teamcolo.

```

### Additional context

_No response_

## Workaround
The issue occurs when running 32-bit Python. Install and use Briefcase with 64-bit Python. [Full details](https://github.com/beeware/briefcase/issues/1017#issuecomment-1581285158).