bugs after updating lay theme and installing fullscreen slider addon

[Alicez]

Hello,
I have many bugs in building my website.
Long story short, I had an old license (still valid of course), but redid my website from zero on another hosting after some years and updated to latest versions + bought the fullscreen slider addon.

Installations worked perfectly, but now I'm simply trying to built a slider for my homepage and show alternatively many bugs:
• doesn't display content on desktop but yes on mobile
• after activating the slider, shows a pixelated images and doesn't scroll neither automatically or by click
• even the first image doesn't show full screen, but with part of the next image in the slider popping up
• Page analysis seems to not see that I have inserted content

Following some suggestions on troubleshooting I deactivated the old Carousel to avoid conflicts and also some WP Cache and unuseful plugins, but nothing seems to get better.

What's going on? ahah

Here is the link to the website at the actual state even if I don't know how helpful it could be and don't know what you see:
https://www.alicezani.com/

Thank you so much in advance and let me know if you can help.
XX

[arminunruh]

are u sure u are using all the latest versions?

can u download the latest carousel version on laykeymanager.com

some people have an older version that is not updateable anymore
:/