Proper redirect of a user without permissions to see a certain page

[pcenov]

Observed behavior

This is a follow-up to #12775 and also the issue is extant in Kolibri 0.17.3

1. Attempting to view the Learners page as a Learner user results in seeing a blank page, instead of seeing the message "You must be signed in as an admin or coach to view this page":

2. The 'Go to home page' link is not working for the rest of the pages where it is shown:

permissions.mp4

Expected behavior

Proper redirect of a user without permissions to view a certain page.

Steps to reproduce the issue

1. Install the build from Coach main navigation refactor #12775
2. Go to Coach > Class home as a Coach
3. Sign out and sign in as a Learner
4. Attempt to view any of the Coach pages (or other pages not accessible to a Learner)

Usage Details

Windows 11, Ubuntu 22 - Chrome

[pcenov]

@radinamatic

[rtibbles]

I think this is a duplicate of #12442, but leaving this open as it has more explicit path to replication.