Zoom Not Working with ManyCam

Yesterday my camera would not work through ManyCam. A black screen appeared where my picture should have been displayed.  I'm a basic user, using Zoom for teaching students around the world.  I create my lessons in ManyCam and need to be able to use this as my camera source.  I switch to my LG camera and everything is fine.  Anyone else having trouble with third party cameras??  My student could hear me, but no luck with the camera.  I'm using an LG Gram laptop and open Zoom through Chrome.  Any suggestions or update on changes would be great.  Thanks!