Full screen doesn’t works as guest

@fabrix95

We checked out your site and it seems that you may have filtered the body_class: https://developer.wordpress.org/reference/functions/body_class/ for your site removing all the classes required for the site to function properly. So, maybe if you have changed any theme code on your own then, revert back the changes done and check once? Also, try checking once deactivating the used plugin in your site and see if that helps you resolve the issue too as well as try reinstalling the theme too. But first of all, create site backup before proceeding to these solutions which we mentioned.

Thanks.