CoursePress 2.0 Update/Upgrade - Errors

Yesterday I upgraded the CoursePress plugin to 2.0 and got errors, nothing was working as was supposed to, how's it going with other users? I took a screenshot of the fatal error.

Should I wait for the bug fixes? I'm afraid of trying again since I have a membership website which cannot be out of service.

In order to fix the problem I had to restore a file and database backup.