Problem with webcam (error connecting)

since one of the last updates (machine tab) I have a problem with connecting to an USB webcam module (OV3660).

This particular module worked already fine and I got an image. But now it does not.
It is and was connected to the waveshare USB hub (piggiback to Pi4B).

Now I always get the message:
"Error while connecting to http://192.168.xxx.xxx/webcam/?action=snapshot"
(xxx ist actually a number, just removed it here)

Only strange thing: I checked via Putty and "ls /dev/v4l/by-id". Now there are two devices listed instead of one.

I tried:
* Disconnectiung/Reconnecting the camera -> no success
* Removing/Adding webcam from mainsail -> no success
* Checked via Putty "ls /dev/v4l/by-id" -> camera is visible
* Checked via Putty "lsusb | tail -n 10" -> camera is connected

I'm a bit lost now. What else can I do?

Problem with webcam (error connecting)

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