ONLINE ESL Teacher - MANYCAM ISN'T WORING!

Hi, ManyCam, and fellow online teachers!
Is anyone else experiencing problems with ManyCam since the latest MacOs update to MacOS Sonoma Version 14.2.1?
It keeps saying, “The camera may be occupied; please close other software.”

It’s doing this on all of my teaching platforms, such as ClassIn, Zoom, GoogleMeet, and TEHESO.
I haven’t been able to use ManyCam for the past 2 months and the team hasn’t been very helpful!
I have been back and forth with them for the past 2 months, paying for a subscription I’m not able to use.
I NEED this application to work in order to teach.
Apple has been exceptionally helpful and has done several different troubleshootings to try and resolve the issue; the fault is on MANYCAM’S side!
I have done my research and have tried all of the following approaches, the problem still isn’t resolved:

Apple has suggested that ManyCam looks further into this problem.
I have several teacher friends facing the same problem.
Is anyone else experiencing this issue too?
MANYCAM PLEASE ASSIST ME ASAP!
It’s been 2 months too long!

Any updates on the issues with ClassIn?