Hello,
I had the same problem. I used Messenger for some time, and suddenly i received the same error message. I tried :
1- Enable Privacy setting under Camera (app)
Was already enabled.
2- Enable/Disable other cameras in Device Manager
Didn't work. I only have one camera.
3- Add EnableFrameServerMode under HKEY_LOCAL_MACHINE\ SOFTWARE\ WOW6432Node\ Microsoft\ Windows Media Foundation\ Platform
No change
4- Repair Messenger. (i didn't know it existed, but i found just beside the Uninstall button in the control panel)
SUCCESS! It works now
Hope that helps.
