sidebar issues on 404 error page

Hi,

I am having problems with the sidebar in 404 error pages.

In my dashboard, I had the 404 pages set to display BLANK (only top navigation menu) and NO sidebars at all.

However, some kind of error in the colormag theme causes the default sidebar to display on all 404 error pages.

This error persists, even after going to selecting, for example, a simple category ONLY widget to display on sidebars of 404 pages.

This caused the category widget to show in ADDITION to the default sidebar.

I tried to fix this by setting the default layout to display without any sidebars,

However, while now the 404 displays correctly without the sidebar, the sidebars are now missing on all category, archive post pages etc..

It seems the override function for the 404 error sidebar is NOT overriding the default settings

How can I get the right sidebar to display only on posts and pages but NOT on 404 pages please?

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