Crashing when scanning an app

[GanbaruTobi]

gbaru@GBARU-MAIN:/home/gbaru/php-class-graph$ php examples/whole_project.php -p /home/gbaru/ilias/ILIAS-7.24
PHP Warning: Undefined array key 265 in /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/Lexer.php on line 283
PHP Fatal error: Uncaught TypeError: PhpParser\Lexer::getNextToken(): Return value must be of type int, null returned in /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/Lexer.php:317
Stack trace:
#0 /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/ParserAbstract.php(208): PhpParser\Lexer->getNextToken()
#1 /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/ParserAbstract.php(158): PhpParser\ParserAbstract->doParse()
#2 /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/Parser/Multiple.php(51): PhpParser\ParserAbstract->parse()
#3 /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/Parser/Multiple.php(32): PhpParser\Parser\Multiple->tryParse()
#4 /home/gbaru/php-class-graph/src/Traverser.php(40): PhpParser\Parser\Multiple->parse()
#5 /home/gbaru/php-class-graph/src/FilteredRecursiveDependencyChecker.php(27): ClassGraph\Traverser->traverse()
#6 /home/gbaru/php-class-graph/examples/whole_project.php(65): ClassGraph\FilteredRecursiveDependencyChecker->run()
#7 {main}
thrown in /home/gbaru/php-class-graph/vendor/nikic/php-parser/lib/PhpParser/Lexer.php on line 317