Hi Kelly
You may have heard about the Cambridge Analytica data breach with Facebook. As soon as that happened, Facebook put an abrupt stop to many app developers, including ours. We have tried to work with Facebook to restore the access the previously permitted us, but have just received notice that our app was declined. https://theeventscalendar.com/knowledgebase/ea-fb-privacy-policy/.
We may have a workaround involving using an iCal export from Facebook to import into your site. We are testing this method a bit further before officially recommending it. We will post an update on the linked site above if we are ready to suggest it.
So very sorry for this. We truly have tried working with and following up with Facebook repeatedly.
Thanks
Courtney