Ok – I mean it certainly looks like quite a striking theme and I can understand your reluctance to drop it. That said, completing those steps – whether on your live site or a test site – so we can be sure the conflict is with the theme (it may not be) would be useful information.
One thing I do notice is that the calendar (at your /events/ URL) is actually loading and has been rendered, but your theme’s unique structure means it just isn’t visible. You also seem to be using the default events template – that may be a factor here and so it could be worth changing to the default page template and seeing if that helps here (via the Events → Settings → Display admin screen).
It looks like a sufficiently unusual theme however that it may be best to seek support from its author for assistance with this.