Fatal error: Uncaught Error: Call to undefined function Symfony\Component\Mercure\Debug\trigger_deprecation() in /home/believers/public_html/concrete/vendor/symfony/mercure/src/Debug/TraceablePublisher.php:21 Stack trace: #0 {main} thrown in /home/believers/public_html/concrete/vendor/symfony/mercure/src/Debug/TraceablePublisher.php on line 21