How to switch back the old Messages for Facebook Page Inbox

Recently, a lot of Facebook Page admins had a hard time switching back the old message of the Facebook Page Inbox. Facebook still actually provided the easy button for this.

 

Here's how you can switch it back:

Inside the Facebook Page Messenger Inbox, click on the Question Mark icon.

 

Then on the pop-up page, click the "Use Previous Version"

 

 

Then you got your old Facebook Page Inbox.