Fatal error: Uncaught TypeError: property_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in /var/www/html/api/index.php:88 Stack trace: #0 /var/www/html/api/index.php(88): property_exists() #1 /var/www/html/api/index.php(22): check_for_ws_message() #2 {main} thrown in /var/www/html/api/index.php on line 88