Profile: bryanC-4

Problem:

Accessing page via domain.com/columns/ was giving 404 error while domain.com/?columnnists=postslug proved to work just fine.
Solution:

Upon further inspection I found the following rules in the .htaccess file:

RewriteRule ^/?taxonomy - [L,R=404]
RewriteRule ^/?category - [L,R=404]
RewriteRule ^/?columnists - [L,R=404]
RewriteRule ^/?rss.xml - [L,R=404]
RewriteRule ^/?ads.txt - [L,R=404]
RewriteRule ^/?podcasts/shows/ - [L,R=404]

Editing the .htaccess file fixed the error.