Fatal error: Uncaught Error: Class "PhpParser\ParserAbstract" not found in /var/www/html/festival/vendor/nikic/php-parser/lib/PhpParser/Parser/Php7.php:19 Stack trace: #0 {main} thrown in /var/www/html/festival/vendor/nikic/php-parser/lib/PhpParser/Parser/Php7.php on line 19