The CSS of our Error Page got ruined all of a sudden

[Marina Alsahawneh]

Describe the bug
The CSS of our Error Page got ruined all of a sudden, it needs to be fixed.

To Reproduce
Steps to reproduce the behavior:

1. Go to josa.ngo.
2. Head to any random path, /josaerror404 for instance.
3. See error.

Expected behavior
The old layout should be restored (i.e. CSS bugs should be fixed).

Screenshots