Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\Exception\UnexpectedValueException" not found in /home/.sites/site4/wwwroot/web/ui/vendor/symfony/http-foundation/Exception/JsonException.php:19 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/ui/vendor/symfony/http-foundation/Exception/JsonException.php on line 19