Hi Paula,
Thanks for reaching out to us! I’d be happy to help you 🙂
I visited your website and every time I clicked on one of your events, I landed on a 404 page (page not found). Is is a new problem?
Regarding the HTTP Error 500, when do you encounter that error exactly? Just after you publish a new recurring event?
Could you try to deactivate all your other plugins, and check if you still have the same issue? (first, you may want to read our documentation about testing for conflicts).
Please let me know how it goes,
Cheers,
Jeremy