UPDATE
Although there was no answer of the support, i figured out that the problem is due to changes on facebooks Event API.
Thanks for the quick anouncement, you send via Email. I found all Informations on this page:
https://theeventscalendar.com/knowledgebase/ea-fb-privacy-policy/
I feel with you guys and hope you are able to restore all features.
(The import of featured images isnt working at all. My statement in the first post was wrong!)