Hello @Tobia1971,
Thanks for writing to us.
I checked your site it seems that the Theme Option and Page builder is working fine at my end. It might be the issue of the browser cache I would suggest you please clear your browser cache and then check it again or check it in the private mode of the browser. If it doesn’t work for you I would also suggest you please make sure there is no browser extension on your browser which is stopping loading JS and CSS.
I have tested your site in the Google Chrome browser version 103.0.5060.114. Please let us know which browser you are using for the site testing and the version of the browser, in case you are using an older version of the browser I would suggest you please update your browser and then check it. If the issue still persists please let us.
Thanks