Fatal error: Uncaught Error: Interface "PhpCsFixer\Differ\DifferInterface" not found in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Support/CodingStyle/Differ.php:8 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Support/CodingStyle/Differ.php on line 8