Change Error Page

Hello there, Plugin is great!

I am wondering how I can change the default error page for when a user tries to access something they dont have permission to access. Currently it the page is empty and says:

The page can’t be found.
It looks like nothing was found at this location.

I am using Elementor and already created a template for error pages, but it doesnt seem to work on pages where Groups is restricting access.

Thanks!

The page I need help with: [log in to see the link]