camera not working
Camera on MacBook not working - how do I fix it?
MacBook
Question marked as
I have seen enough sporadic reports about that to make me suspect it's a bug Apple introduced with that update. Possible solutions involve booting Safe Mode, followed by restarting normally.
Use safe mode to isolate issues with your Mac
If that doesn't immediately solve the problem reinstalling macOS has also been reported to fix it.
How to reinstall macOS from macOS Recovery
Neither one of those options will introduce additional problems or make anything worse, so try them in that order.
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There are several reports substantially similar to yours. Here's a recent one: Webcam not working on Macbook Pro
In it, an Apple Community Specialist with a superlative record suggested creating a test User Account, so try that also. In addition to those recommendations, other potentially helpful actions involve resetting the subject Mac's SMC as well as its NVRAM.
SMC Reset: How to reset the SMC of your Mac
NVRAM Reset: Reset NVRAM or PRAM on your Mac
If you don't get anywhere start a service request online.
If it's a bug as I suspect it is, will just have to wait for Apple to fix it.