Hey merkmonsters,
Thanks for reaching out!
Sorry to hear about your issue with the add to cart button. I’d be happy to help you!
Could you please share your system information with me in a private reply?
Also can you share me some urls to the event where this problem can be seen?
It also might be worth checking how those events, the tickets and the ticket sale dates are set up. The ticket sale dates you can find if you open the event for editing, then the ticket, and there you should see an ‘Advanced’ tab. Once you open that section you should see start and end sale date fields. Check how those are set.
Cheers,
Andras