Hey @Alessandro,
I’m sorry you’re having trouble here!
I’d recommend first running through our full set of troubleshooting steps here → https://theeventscalendar.com/knowledgebase/testing-for-conflicts/
These issues are likely theme- or plugin-conflict-related and these steps will help reveal if that’s the case.
In the meantime, can you also clarify what version of The Events Calendar is active on your site? It doesn’t show in your “System Information” for some reason, but may be relevant here.
Thank you!
George