Fix Problems with Creating Facebook Events | Schedule Online vs In-Person | Admission Link

I didn't understand how you got to that very first screen where you set up your event and chose which profile to use. I am trying, with no success to create an event via my business page. It keeps saying 'something went wrong' and I can't get past it, although I've set up events via this page before. Any clues?

Cannot even get to the first page. Get a load of nonsense about "Connect a new data source"