Fatal error: Uncaught Error: Class "OpenTelemetry\Context\ZendObserverFiber" not found in /var/www/usonboard.com/vendor/open-telemetry/context/fiber/initialize_fiber_handler.php:7 Stack trace: #0 {main} thrown in /var/www/usonboard.com/vendor/open-telemetry/context/fiber/initialize_fiber_handler.php on line 7