Domain mapping breaks some plugin scripts and css

The solution, adding this to my wp-config.php:

define( ‘PLUGINDIR’, ‘wp-app-content/plugins’ );

https://wordpress.org/support/topic/domain-mapping-breaks-some-plugin-scripts-and-css

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