Fatal error: Uncaught Error: Class 'PHPCompatibility\Sniff' not found in C:\xampp7\htdocs\edgpens\vendor\phpcompatibility\php-compatibility\PHPCompatibility\Sniffs\Operators\ChangedConcatOperatorPrecedenceSniff.php:35 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\vendor\phpcompatibility\php-compatibility\PHPCompatibility\Sniffs\Operators\ChangedConcatOperatorPrecedenceSniff.php on line 35