Hi ._151,
Thank you for reaching out Microsoft Community. We apologize for the inconvenience this has caused you.
To initially troubleshoot this issue, what I can highly recommend is to uninstall/reinstall the camera drivers on your Surface device.
Open Device Manager
Expand Camera & System Devices
Look for the camera drivers, right-click on it and select "uninstall device".If there's a pop-up before you can uninstall the drivers successfully, please leave the box unchecked. Then, restart your Surface to reinstall the drivers automatically.
If the front camera still doesn't work, please download this in-place upgrade to re-update the Windows OS of your Surface device. This won't delete the files nor the existing applications you already have on your Surface. This will just re-update the Windows version and re-download those drivers that are corrupted. Just click "Download Tool Now" and hit Nextonce you see "Upgrade This PC".
If this helps, feel free to mark this post as an answer. Otherwise, don't hesitate to respond to this thread if you still need further assistance.
Kind Regards,
Crest_Z