@milo Hi and welcome to th eForum.
As Zorin is based on Ubuntu, you can also search there for potential solutions.
I have found this:
Also similar webcam issue, but different webcam, on here:
I dont know if that will help. Let us know how you get on. Others on here may have better ideas.
Added
Also some older threads on old Zorin forum, including:
https://zoringroup.com/forum/5/7033/
Note there is a shortcut to old Zorin Forum in the hamburger menu at top right of this forum screen.