To my knowledge (and I could easily be wrong), using iPad camera on PC (ie as a USB webcam) is not a native/default capability.
so you had to have installed something to enable seeing camera on PC.. I believe
- are you doing an HDMI output and capture card?
- camera transmit over WiFi? (if yes, which protocol/app?)
- USB connected iPad to PC (again, I believe a 3rd party app required to enable use of camera in this situation)
Presuming using one of the above, and that your PC has OS updates, you need to make sure whatever software is used to enable access to the iPad camera is updated/compatible with latest OS (Operating System) updates (or version, for ex if you upgrade from WIn10 to Win11)