Error when opening submenu

Let me first of all compliment and thank you for this system. It’s easy to install and even easier and clear to use. Great job!

Then: I’m a Firefox (56.0.2 64bit) user in which I’m getting the following error (console) when clicking on a menu item: Error: Permission denied to access property “apply”. The error occurs in and also shows on your website when I try to open one of the two submenus (support or community) so I guess it uses the same code.

In the meanwhile I’m using Chrome in which everything seems to work fine, but maybe you can look into this for a future release.

Again: great job!

I did some research and found out this was related to an installed addon (popup blocker). So the issue is resolved.