DISALLOW_FILE_EDIT is defined and set to “false”

When activating the “Disable the built-in file editors” feature under Settings > Hardening in Really Simple SSL, you may receive a notice that “the DISALLOW_FILE_EDIT constant is defined and set to false” as shown in the below image.

When DISALLOW_FILE_EDIT has been defined in the wp-config.php with a false value, Really Simple SSL cannot override this.

The solution is to remove the following line from your wp-config.php file:

define( 'DISALLOW_FILE_EDIT', false );