0;Error 200

I have user who is experiencing this error (0; Error 200) when she tries to reschedule a meeting. Here's how she explained it the ticket she submitted to us:
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"Hi there, 

#1:  Many of my meetings have been rescheduled from Teams to Zoom.  I’m finding that whenever I need to move a meeting, I’m consistently getting this error message: "

Is this some sort of permission issue that is causing this to happen? We just switched to Zoom and I have no idea. Also, I wasnt able to find any way to upload a picture of the error message, either, but that is essentially what it said.