Hey Casper,
Welcome back!
I’ve ran a quick test and successfully imported the event from https://www.facebook.com/events/734280493430380
To get started, could you please access your Dashboard and head over to Events > Settings > Imports > Global Import Settings and change your import limit type to “By date range” and the Import Date Range Limit to “Three months”? Try to import the event again after this change.
If the issue persists, please head over to Events > Help and send us a screenshot of the Event Aggregator System Status: Do you see any errors in there?
Also, please access the Events > Settings > APIs tab and under Facebook click the “Refresh your connection with Facebook” button to see if it changes anything.
If the issue persists after trying to refresh your connection, I would suggest you to click on “Disconnect” and after that reconnect to Facebook again.
I hope this helps! If you have any other questions at all please feel free to let me know and I’d be happy to help as best I can!
Cheers,
Patricia