Good evening Fernando and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the windows not scrolling down as expected.
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/
Could you also please send me a copy of your WordPress theme / child theme in a .zip file link (via Dropbox or Google Drive) so that I can run some tests on my end ?
Please ensure you are using the latest files as found on your actual website.
This way I will get access to any updates you might have made.
Best regards,
Geoff B.