Fatal error: Uncaught Error: Call to undefined function Symfony\Component\Mercure\Jwt\trigger_deprecation() in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/symfony/mercure/src/Jwt/StaticJwtProvider.php:16 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/symfony/mercure/src/Jwt/StaticJwtProvider.php on line 16