Error copying file on windows

When copying a folder I get the following error:

Traceback (most recent call last):
  File "fman\impl\fs_cache.py", line 36, in query
KeyError: 'stat'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "fman\impl\plugins\command_registry.py", line 106, in _execute_command
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\commands\__init__.py", line 472, in __call__
    self._call(files, dest_dir, src_dir, dest_name)
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\commands\__init__.py", line 626, in _call
    submit_task(CopyFiles(files, dest_dir, src_dir, dest_name))
  File "fman\__init__.py", line 319, in submit_task
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fileoperations.py", line 41, in __call__
    if not self._gather_files():
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fileoperations.py", line 91, in _gather_files
    self._enqueue(self._prepare_transfer(src, dest))
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fileoperations.py", line 155, in _enqueue
    for task in self._iter(tasks):
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fileoperations.py", line 211, in _iter
    for item in iterable:
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fs\local\__init__.py", line 178, in _prepare_copy
    join(src_url, name), join(dst_url, name), measure_size
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fs\local\__init__.py", line 178, in _prepare_copy
    join(src_url, name), join(dst_url, name), measure_size
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fs\local\__init__.py", line 169, in _prepare_copy
    src_is_dir = self.is_dir(src_path)
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fs\local\__init__.py", line 41, in is_dir
    return S_ISDIR(self.stat(existing_path).st_mode)
  File "fman\fs.py", line 201, in wrapper
  File "fman\impl\fs_cache.py", line 12, in query
  File "fman\impl\fs_cache.py", line 38, in query
  File "fman\fs.py", line 201, in <lambda>
  File "C:\Users\Gilbert\AppData\Local\fman\Versions\1.1.7\Plugins\Core\core\fs\local\__init__.py", line 44, in stat
    return os.stat(self._url_to_os_path(path))
OSError: [WinError 1920] The file cannot be accessed by the system: 'C:\\test\\test\\venv\\bin\\python'

The folder being copied was created by the python venv module i.e. python3 -m venv venv in the windows subsystem for linux. The file the causes a problem appears to be a symbolic link:

# ls -la  venv/bin/
total 12
drwxrwxrwx 1 root root  512 Aug  8 13:26 .
drwxrwxrwx 1 root root  512 Aug  8 13:26 ..
-rwxrwxrwx 1 root root 2132 Aug  8 13:26 activate
-rwxrwxrwx 1 root root 1248 Aug  8 13:26 activate.csh
-rwxrwxrwx 1 root root 2384 Aug  8 13:26 activate.fish
-rwxrwxrwx 1 root root  245 Aug  8 13:25 easy_install
-rwxrwxrwx 1 root root  245 Aug  8 13:25 easy_install-3.4
-rwxrwxrwx 1 root root  217 Aug  8 13:26 pip
-rwxrwxrwx 1 root root  217 Aug  8 13:26 pip3
-rwxrwxrwx 1 root root  217 Aug  8 13:26 pip3.4
lrwxrwxrwx 1 root root    7 Aug  8 13:25 python -> python3
lrwxrwxrwx 1 root root   16 Aug  8 13:25 python3 -> /usr/bin/python3

Start in core/fs/local/init.py at _prepare_copy(), is_dir(), and stat(), then inspect fman/impl/fs_cache.py around query(). Reproduce the failure by copying a Python venv created in Windows Subsystem for Linux, including its symbolic links. Done means copying that folder no longer raises the reported WinError.