Fatal error: Uncaught Error: Class "Doctrine\Common\Lexer\AbstractLexer" not found in C:\Apache24_x64\htdocs\ipad\vendor\doctrine\lexer\tests\Doctrine\Common\Lexer\ConcreteLexer.php:7 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\doctrine\lexer\tests\Doctrine\Common\Lexer\ConcreteLexer.php on line 7