Due to new Facebook data access restrictions and a change in the API, we are no longer able to mention tag Facebook Pages in Grabyo by typing in a Page name in the search field. Grabyo uses the /search API endpoint to perform mentions tagging of Facebook Pages which has been deprecated effective immediately.
For more information please see this article: https://newsroom.fb.com/news/2018/04/restricting-data-access/
Option 1: Copy the Facebook Page URL and paste it in the branded content field, then select your Page from the drop down.
Option 2: Each Facebook Page has an ID, which you can use in the branded content field. If you have this handy, you can paste the ID into the branded content field and your Page will appear in the drop down.
If you would like to find out your Page ID, please go to https://findmyfbid.com/ and enter in the Facebook Page URL, this will return a numeric ID.