Meeting view of self

After setting up the meeting, and starting the meeting, the host was unable to see herself during the meeting.  The participants could see her but she was not able to see herself on the screen.  The invitation details were rechecked, the View box was checked, the Video (v) area was reviewed, and the Participant area was checked, all without a solution.  She is on a Mach laptop and this was the first time this happened.  What should she do?