Error: During inheritance of MakinaCorpus\QueryBuilder\Query\Where\WhereWhere, while autoloading MakinaCorpus\QueryBuilder\Query\Where\WhereWhereNested: Uncaught ReflectionException: Class "MakinaCorpus\QueryBuilder\Query\Where\WhereWhere" does not exist in /code/app/vendor/symfony/error-handler/DebugClassLoader.php:324
So, in fact the code does exists, and PHP does know how to load it, but the debug component of Symfony does not.
Test with Symfony 7.x to ensure it's fixed, if not open a bug there if none exist. This would need reproducing the error.
In all cases, document that using APP_DEBUG=0 is mandatory with bugguy Symfony versions.
So, in fact the code does exists, and PHP does know how to load it, but the debug component of Symfony does not.
APP_DEBUG=0
is mandatory with bugguy Symfony versions.