Hey Dominik,
Sorry to hear about your problems. Just to be 100% clear, can you clarify what you mean by this:
The „Save Changes“ button under „Display“ is not working for me or for anyone else on our WordPress.
Do you mean the Save Changes button under the “Display” Events options? Or something different? If possible, take a screenshot of the exact location you’re talking about.
This is not a known issue, regardless of the location of the button, so for the first step here, I’d recommend running through our complete set of Troubleshooting Steps outlined here → https://theeventscalendar.com/knowledgebase/testing-for-conflicts/
Please run through those steps in full and let us know what you find – try the “Save Changes” button after each step in that process, and see if its behavior improves at all.
Thank you!
George