I have an Archive View with locations for CPT Archive, Category Archive (All) and for Search Results.
Works great for CPT Archive and Search Results, but for Category it results in Page not found.
Peter, I took out the setting for the categoy, so that the default template would be used and not the view.
Also 404 error.
Changed to default WP theme, same issue.
So nothing to do with MetaBox. Let's close this ticket, I'll contact my WP helpdesk.