jakaskerl I tried the command, now it gives following error:

Traceback (most recent call last):
File "depthai_demo.py", line 1059, in <module>
raise RuntimeError("QT backend is not available, run the script with --guiType \"cv\" to use OpenCV backend")
RuntimeError: QT backend is not available, run the script with --guiType "cv" to use OpenCV backend
Sentry is attempting to send 2 pending error messages
Waiting up to 2 seconds
Press Ctrl-C to quit
In hardware side, there is a click sound [very faint but audible] when I start depathai_demo.py, is it normal or should I return to the vendor for replacement?
I am missing some quick start guide which is available? I have also purchased OAK-D CM4 module and also facing some problems in that module. Is there any FAQ available or should I start discussion here only?