We installed the LTI Pro App via the Zoom Marketplace in our business account and then added a new credential to get the LTI URL, LTI Key and Secret.
In Moodle we then added (manually configured) an external tool with the URL, key and secret. After that, we created a new course added the newly created LTI tool activity. If you open the course now, you will only get an error message stating that the invitation does not exist (Error Code 1120). I googled and found nothing about this error code, neither did the support I called. I checked all data about three times and could not find any errors.
Now the strange thing: We also have a Pro Account, and there the problems do not occur. It works flawlessly from the beginning and the zoom meetings are all displayed. I have compared the settings of both accounts and could not find any differences.
Invitation not exist
Error Code 1120