I tried to  ‘Promote Group with an Advert’ under a group I’m the admin of on Facebook.

“Your account has been disabled. All of your adverts have been stopped and should not be run again on the site under any circumstances. Generally, we disable an account if too many of its adverts violate our Terms of Use or Advertising guidelines. Unfortunately we cannot provide you with the specific violations that have been deemed abusive. Please review our Terms of Use and Advertising guidelines if you have any further questions.Permission Invalid — You do not have permission to create adverts on that account.”