WordPress MU Domain Mapping Customizer Error

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

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)