Fatal error: Uncaught Error: Undefined constant "STDERR" in D:\Codex\Hom3r V2\outputs\platform-repair-20260808\FilyX\tests\php\chat-widget.php:24 Stack trace: #0 {main} thrown in D:\Codex\Hom3r V2\outputs\platform-repair-20260808\FilyX\tests\php\chat-widget.php on line 24