Nexus 7 running Android 6 – black screen viewing issues

Live V3 camera view went to black this morning on my Nexus 7 running Android 6. It had been running fine as a live monitor. The KB/s still shows it’s on. All I get is a black box. An old Moto G5 Plus running 8.1 and my Pixel 3aXL running 11 are both functioning just fine.

Any thoughts or advice would be appreciated. This is my first post in this forum, so I apologize if I have stepped outside the rules.