Fatal error: Uncaught Error: Interface "OpenTelemetry\API\Metrics\ObservableCallbackInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/open-telemetry/sdk/Metrics/ObservableCallback.php:14 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/open-telemetry/sdk/Metrics/ObservableCallback.php on line 14