Some console errors and weird things

So I recently installed the NextGEN pro gallery, but it won’t work properly – Their support suggested it may have to do with the errors visible in the console upon loading. I have no idea where these come from and have no luck when trying to google.

See page: https://matthicksphoto.com/clients/testpage/

The errors that seem relevant are as follows:

Uncaught TypeError: Cannot read property ‘replace’ of undefinedi.extend._routeToRegExp @ backbone.min.js?ver=1.1.2:1i.extend.route @ backbone.min.js?ver=1.1.2:1Backbone.Router.extend.initialize @ nextgen_pro_lightbox.js:421e.Router @ backbone.min.js?ver=1.1.2:1s @ backbone.min.js?ver=1.1.2:1(anonymous function) @ nextgen_pro_lightbox.js:701m.Callbacks.j @ jquery.js?ver=1.11.2:2m.Callbacks.k.fireWith @ jquery.js?ver=1.11.2:2m.extend.ready @ jquery.js?ver=1.11.2:2J @ jquery.js?ver=1.11.2:2
all.js:64 Invalid App Id: Must be a number or numeric string representing the application id.

The heck is going on?!