Fatal error: Uncaught Error: Class 'PhpParser\NodeAbstract' not found in /var/www/typo3/vendor/nikic/php-parser/lib/PhpParser/Node/MatchArm.php:8 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/nikic/php-parser/lib/PhpParser/Node/MatchArm.php on line 8