HTTP EROR 500 when registering

With the latest update, all my community (including me) is receiving a Http 500 error page when submitting their registration to an event. When reloading the page, they find themselves registered but with an error message: you have registered to this event already
Need help here.
Thanks.

Hi

We need to check directly on your site to see what's causing this issue and get it sorted. So please submit a support ticket sending us:

- Super admin account
- Link to the page which we can perform registration and see this error

I will check to see why it happens and get it sorted

Regards,

Tuan