No, this is not just a mobile issue. In case you're curious, the pusher is used by mobile/js/controllers.js but is located in assets/includes/pusher.php
I'm not a programmer at all, absolutely. I'm a doctor, but I have such a slightly strange hobby (maybe because I like to think and to find the right solution
Yes, you are right, controller.js may be problematic or index.php may also be problematic. I did a lot of thinking yesterday and could not find it: ://