Sometimes in a Collaborate room, you aren't given Moderator rights even if you’re a teacher in the Moodle workspace or when you created a room outside of Moodle. Usually deleting cookies in Google Chrome helps.
1. In Chrome, paste this into the URL field:
2. Type "bbcollab" in the search box.
3. Click on eu.bbcollab.com.
4. Click the Clear Data button and confirm the deletion. Click the Reset Permissions button as well.
5. Close Chrome browser completely and reopen it. If you want to be absolutely sure of this, restart your computer.
6. Open the Collaborate room again and check if everything works.
If these instructions don’t help, creating a new Collaborate Room may be the only solution.