Fatal error: Uncaught Error: Class 'Doctrine\Common\Lexer\AbstractLexer' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\annotations\lib\Doctrine\Common\Annotations\DocLexer.php:19 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\annotations\lib\Doctrine\Common\Annotations\DocLexer.php on line 19