AttributeError: 'PyQt5Window' object has no attribute '_ctx'

[Julius-ZCJ]

Here is my python env:
moderngl 5.12.0
moderngl-window 3.1.1
pyglet 2.1.4
pyglm 2.8.2
PyOpenGL 3.1.9
PyOpenGL-accelerate 3.1.9
PyQt5 5.15.11
PyQt5-Qt5 5.15.16
PyQt5_sip 12.17.0
PySocks 1.7.1
PyWavelets 1.6.0
aitviewer 1.13.0
chumpy 0.70

When I aitviewer to show a simulation interface, then I got this error:
Traceback (most recent call last):
File "/home/xxx/miniconda3/envs/torch_gpu/lib/python3.9/site-packages/moderngl_window/context/pyqt5/window.py", line 237, in resize
if self._ctx:
AttributeError: 'PyQt5Window' object has no attribute '_ctx'

I search "self._ctx" in window.py, and not find define code

what can I do to fix this bug?
thanks

[einarf]

pyside5 / pyqt5 is pretty old and probably needs to be upgraded to 6. I'm not sure why it doesn't work for you with python 3.9. In theory that should be fine. Can you share the full stack trace?

Is it possible switching to another window backend?