Error when trying to authenticate on Windows10

[dbilewicz]

Hi,

When i'm trying to use "authorise account" on Windows i got:

Traceback (most recent call last):
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pystray\_win32.py", line 401, in _dispatcher
    return int(icon._message_handlers.get(
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pystray\_win32.py", line 213, in _on_notify
    descriptors[index - 1](self)
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pystray\_base.py", line 324, in inner
    callback(self)
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pystray\_base.py", line 449, in __call__
    return self._action(icon, self)
  File "C:\Users\darek\Desktop\email-oauth2-proxy-main\emailproxy.py", line 1983, in authorise_account
    webview.start(gui=forced_gui, debug=Log.get_level() == logging.DEBUG)
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\webview\__init__.py", line 122, in start
    guilib = initialize(gui)
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\webview\guilib.py", line 101, in initialize
    if not try_import(guis):
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\webview\guilib.py", line 62, in try_import
    if import_func():
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\webview\guilib.py", line 52, in import_winforms
    import webview.platforms.winforms as guilib
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\webview\platforms\winforms.py", line 31, in <module>
    import clr
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\clr.py", line 6, in <module>
    load()
  File "C:\Users\darek\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pythonnet\__init__.py", line 42, in load
    func = _LOADER_ASSEMBLY["Python.Runtime.Loader.Initialize"]
TypeError: 'Assembly' object is not subscriptable

I tried this on two Windows 10 instances with the same result.

[simonrob]

This is discussed in the troubleshooting section of the readme. The Windows packages required to display the authentication pop-up are not yet compatible with Python 3.10. You should be able to resolve this via one of the following options:

• python -m pip install --pre pythonnet
• Downgrade to an older Python version
• Use the --local-server-auth proxy option

[simonrob]

Just to follow up - I see that pythonnet 3.0.0 has just yesterday been released. So, you should be able to resolve this simply via python -m pip install --upgrade pythonnet.

Please let me know whether this works – if so, I will update the requirements file accordingly.

[dbilewicz]

On python 3.9.13 i have different error: Unhandled exception - Object reference not set to an instance of an object

[pywebview] [WinError 2] Nie można odnaleźć określonego pliku - Microsoft Edge WebView2 Runtime Registry path: Computer\HKEY_CURRENT_USER\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}
[pywebview] Using WinForms / Chromium

Wyjątek nieobsłużony: System.NullReferenceException: Odwołanie do obiektu nie zostało ustawione na wystąpienie obiektu.
   w System.Windows.Forms.Control.get_CacheTextInternal()
   w System.Windows.Forms.Control.get_Text()
   w System.Windows.Forms.Control.set_Text(String value)
--- Koniec śladu stosu z poprzedniej lokalizacji, w której wystąpił wyjątek ---
   w System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   w Python.Runtime.PythonException.ThrowLastAsClrException()
   w Python.Runtime.Dispatcher.TrueDispatch(Object[] args)
   w Python.Runtime.Dispatcher.Dispatch(Object[] args)
   w __System_Threading_ThreadStartDispatcher.Invoke()
   w System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   w System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   w System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   w System.Threading.ThreadHelper.ThreadStart()

[dbilewicz]

It looks like Registry path is wrong - i have "Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\EdgeUpdate\Clients{56EB18F8-B008-4CBD-B6D2-8C97FE7E9062}"

[dbilewicz]

I found simmilar issue on pywebview project - r0x0r/pywebview#953
They say it should work despite this error.

[HollererJ]

Have the same issue, the application stops working when the error occurs.
Is there any workaround ?

[simonrob]

I tried just now with Python 3.10.7, pythonnet 3.0.0.post1 and pywebview 3.6.3 – I can replicate the error. However, I also get exactly the same issue using the basic pywebview example, so unfortunately it is an issue with that module. I have reported this as a new issue.

As a workaround, use the proxy with the --local-server-auth option – you will have to monitor the log to catch the first authorisation request, but hopefully by the time you are requested to authorise again (typically several months) the issue will have been resolved.

[simonrob]

d1a7421 temporarily adds a new requirement for Python 3.10 on Windows, which resolves the issue until pywebview is updated. You can also do this manually via:

python -m pip install clr-loader==0.1.7
python -m pip install pythonnet==3.0.0a2

[dbilewicz]

d1a7421 temporarily adds a new requirement for Python 3.10 on Windows, which resolves the issue until pywebview is updated. You can also do this manually via:

python -m pip install clr-loader==0.1.7
python -m pip install pythonnet==3.0.0a2

Correct, that helped. Authorise web window is now vissible and program did not crashed. Thanks alot!

[yon-y]

d1a7421 temporarily adds a new requirement for Python 3.10 on Windows, which resolves the issue until pywebview is updated. You can also do this manually via:

python -m pip install clr-loader==0.1.7
python -m pip install pythonnet==3.0.0a2

That works for me. Thank you!

[simonrob]

I'm going to lock this issue but keep it open just as a place to track when to remove the temporary fix (which will be when pywebview 3.6.4 is released).