This article covers methods to resolve Drupal 406 error.
There are many errors that you may see as you visit different websites across the web.
One of the more common ones is the 406 – Not Acceptable error.
Cause for Drupal 406 error:
In regards to a site on your hosting account, the cause of the 406 error is usually due to a mod_security rule on the server.
Mod_security is a security module in the Apache web server that is enabled by default on all hosting accounts.
If a site, page, or function violates one of these rules, server may send the 406 Not Acceptable error.
To prevent Drupal 406 Not acceptable error:
Mod_security can be turned off. You can also disable specific ModSecurity rules or disable ModSecurity for each domain individually.
If you would like mod_security disabled you can disable mod_security via our Modsec manager plugin in cPanel.