Click on the little "gear" icon for your group, and select Edit group settings.
Scroll down to the section called Apps and click on Add Apps.
In the search box, type Zapier, and then click on the Zapier entry.
Facebook will ask you to confirm that you want to add that app to your group. Click the Add button.
When you’ve done that, it’s really important that you go back to Zapier and reconnect your Facebook Groups account in Zapier. It refreshes the authorization to make sure that Zapier has the most up to date permissions.
Hi @moon I’m sorry for the delay in getting back to you on this. It looks like you have a couple of issues so I’m going to escalate this to the Support Team so that they can take a closer look for you. I’ll be in touch with email to ask for more details so that I can forward this on.