Camera working at sign-in but not after being allowed into room.

Here is the situation that has me stumped 😞

I enter the meeting ID.  After that, it takes me to the page to enter the passcode and my username.  In this window, there is a camera preview there.  The camera is on and working and I can see myself live.  After entering the passcode I am allowed entrance into the zoom room but then my camera view is black.   I have the front camera selected.  I have uninstalled and reinstalled the app.  I have made sure its the newest and still supported app.  The camera works on facebook, google meets, and when I select the camera app on the chromebook.  And again, it works on zoom when your entering the passcode on the video and audio preview.  Just not when you actually enter the room.  Im at a total loss 😞