Fatal error: Uncaught Error: Interface "OpenTelemetry\API\Metrics\ObserverInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/open-telemetry/sdk/Metrics/MetricRegistry/MultiObserver.php:15 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/open-telemetry/sdk/Metrics/MetricRegistry/MultiObserver.php on line 15