I am using WordPress MU Domain Mapping which works fine, but when I try to these any theme's customizer, I get this error when trying to save:

Cheatin’ uh? Sorry, you are not allowed to customize this site.

When I deactivate the plugin, the customizer works. I have 'Remote Login' and ' Redirect administration pages...' unchecked in the options as well.

  • have you tried making another superadmin and logging in as that user? clearing cookies, etc. Just a guess, but i'm wondering if the domain mapping isn't recognizing your permission from a session previous due to the mapping. sub.site.com is now subsite.com and when the function calling up customizer checks your cookie says sub.site.com so it throws an error. I'd make a new user and log in from a different browser to eliminate that as a possibility at least.
    – hwl
    Jun 1, 2017 at 3:16
  • Thanks for the advice but yes, I tried another super user account and still nothing. Jun 1, 2017 at 3:18

2 Answers 2


After much trial and error, I found the cause to be a conflict with the WP Super Cache plugin, I had to disable the following from my wp-config.php file:

define( 'WPCACHEHOME', '/var/www/html/wp-content/plugins/wp-super-cache/' ); //Added by WP-Cache Manager

Try mapping without a plugin then. Since WP 4.5 this is possible. Just point the domain to the server with A record and change the site URL by editing the site. https://codex.wordpress.org/WordPress_Multisite_Domain_Mapping

Or contact the plugin developer here and report the issue: https://wordpress.org/support/plugin/wordpress-mu-domain-mapping

  • Thanks, I'll try to map it directly but I did try to contact the developer directly but haven't heard back yet Jun 2, 2017 at 16:24
  • Mapping them directly still displays the error when saving in the customizer. I made sure to delete the sunrise.php file as well. Jun 2, 2017 at 17:09

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