I have this error message. on the FB portion of the scenario. I am the admin, I have added my business page to the group, but still not working. Error: (#200) Insufficient permission to post to group (200, OAuthException)
Hey @Veronica_Rios , Welcome to the Make Community 
I have made some findings and I found a similar error message that the user was able to resolve in this post: Facebook API. I can’t post to my groups. (#200) Insufficient permission to post to group - Stack Overflow
Check out the solution and see if that works for you as well.
If the issue persists, it would require a closer look, so I would suggest reaching out to Make Support for assistance.
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