Hi @mpfenninger ,
Greetings from the Eventin support team. Thanks for reaching out to us.
Maybe your cart page is not getting somehow by the Eventin plugin when you try to buy tickets. Would you please select the redirect option to the “Cart” or “Checkout”: https://prnt.sc/Lcr0v4sxApl1 page? And then try one more time. And if it does not work, then please create a new cart page.
Without checking your site we are unable to find out the issue from your side. For that, we have to check your site.
Looks like it’s conflicting with other plugins or something.
We will suggest you do deactivate all plugins one by one from your site and check if your system is working correctly or not. After trying all these things, if your problem is not solved then, It would be great if you follow our PINNED post and reach us so that we can help you with additional steps.
Hope you can understand.
Thanks for being with us.
Best Regards