Module not found

[Vinz3056]

Hello,

I'm facing this error :
File "/home/xxxx/StreamDeck.py", line 16, in
from StreamDeck.DeviceManager import DeviceManager
ModuleNotFoundError: No module named 'StreamDeck.DeviceManager'; 'StreamDeck' is not a package

I follow https://python-elgato-streamdeck.readthedocs.io/en/stable/pages/backend_libusb_hidapi.html#linux-ubuntu-debian, all seems OK. But after deplug/plug, reboot, always this error.

StreamDeck XL on Pi 3b+ :
Operating System: Raspbian GNU/Linux 10 (buster)
Kernel: Linux 5.10.103-v7+
Architecture: arm

Thank you for helping.