Fatal error: Uncaught Error: Class "Doctrine\Common\Lexer\AbstractLexer" not found in /home/technoon/public_html/askon/vendor/doctrine/orm/lib/Doctrine/ORM/Query/Lexer.php:24 Stack trace: #0 {main} thrown in /home/technoon/public_html/askon/vendor/doctrine/orm/lib/Doctrine/ORM/Query/Lexer.php on line 24