Fatal error: Uncaught Error: Class "PHPUnit\Framework\Constraint\Constraint" not found in /users/danielstruebig/www/firma/vendor/pelago/emogrifier/tests/Support/Constraint/CssConstraint.php:16 Stack trace: #0 {main} thrown in /users/danielstruebig/www/firma/vendor/pelago/emogrifier/tests/Support/Constraint/CssConstraint.php on line 16