Good afternoon Stefan and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the comments not working on your install.
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Secondly, there was indeed an issue with Comments while the Community Events plugin was installed. But, this has been addressed and fixed in the latest plugin update.
Hang in there as we look at this together.
Best regards,
Geoff B.