Hi Elena, thanks for your reply. Thanks for looking into the website too. You’re right: it looks fine now because we have fixed the issues one by one. The complete design was messed up (partially white instead of black backgrounds, half of the menu bar was missing etc.). The creators of the website used both the theme Editor (Divi) and the Elementor editor. This, in combination with your plugin, seems to have messed up a lot of stuff.
You are right that you offer options to exclude problematic JS but unfortunately I am not experienced enough to know which files will be problematic.
I will not try to reproduce the issue because it took me too long to fix it. For the same reason, I will not use any of the options the plugin offers. Too risky. I had hoped you might respond in time before I can fix it myself so that I can find out what exactly the issue was (thats no criticism! Your reply was very fast indeed). You can close this ticket. Thanks for your support.