How to solve Bootstrap Theme settings override problem? I'm using the Bootstrap base theme and a sub-theme (cdn) in one of my websites.
Normally everything was fine. Then I installed a fresh Drupal into another server and installed the themes I was using before. The problem appears there, I couldn't change any theme settings of Bootstrap themes via Drupal interface. For example I tick the Fluid container and save but it doesn't change, the box goes back to being unchecked.

The new server configurations may be different from old one.
Does anybody know what Bootstrap need for theme settings?
I solved this problem by disabling the ModSecurity on cPanel.


  ModSecurity is an Apache module that applies a set of rules to the activities of software run on Apache. It is used by some hosting environments to assure security, but some rules can interfere with the normal operation of Drupal.