Good evening Renato and welcome back!
Thank you for reaching out to us.
I would love to help you with this topic.
First off, I think you should know that pretty permalinks are typically vital to proper behaviour of our plugins.
With that in mind, if you have managed to get the plugins working fine without them, that is awesome!
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, could you take a look at your settings underĀ Events -> Settings -> Display (specifically the first 2 settings). Try changing them temporarily to see if that helps.
Hang in there!
Geoff B.