User registration not working

We are getting a message that is preventing users from registering or attending a recurring Zoom meeting via our website. Here is a link to the message we get. What might be causing this? We’ve used the same recurring meeting many times without problems.

https://drive.google.com/file/d/1xTnNlGLOOlEIBhS90YfBtUau12LzrV8q

The page I need help with: [log in to see the link]