The app is not built with PySide2

Hi!
I ran into a problem when trying to build an application in Python with the GUI on PySide2. When i try to use the "pyoxidizer run" command, the following exception appears at the moment the application is launched:
```
PySide2/__init__.py: Unable to import shiboken2 from
Traceback (most recent call last):
File "eln_to_excel_gui", line 1, in
File "PySide2", line 61, in
File "PySide2", line 25, in _setupQtDirectories
File "shiboken2", line 27, in
ModuleNotFoundError: No module named 'shiboken2.shiboken2'
SystemError
error: cargo run failed

```
Can you tell me what the problem might be?

Upd.: If I change the import in __ init __ in shiboken2 from
```
from .shiboken2 import *
```
to
```
from shiboken2 import *
```
or move the file shiboken2.py from "PyCharm2019. 3\system\python_stubbs\-606356942\shiboken2" to the "\venv\Lib\site-packages\ " directory , the error will change to:
```
Traceback (most recent call last):
File "eln_to_excel_gui", line 1, in
File "PySide2", line 61, in
File "PySide2", line 33, in _setupQtDirectories
AttributeError: type object 'type' has no attribute '__signature__'
SystemError
error: cargo run failed
```

Reproduce the failure with the `pyoxidizer run` command and compare the traceback from `PySide2/__init__.py` with the `shiboken2` import described in the report. Check whether the changed import or relocated `shiboken2.py` alters the result, and consider the issue resolved only when the PySide2 application launches without either exception.

Written by the indexing model from the issue text.