first log the exception

index.php

@@ -31,7 +31,7 @@ try {
 
 } catch (Exception $ex) {
 	//show the user a detailed error page
-	OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
 	\OCP\Util::writeLog('index', $ex->getMessage(), \OCP\Util::FATAL);
+	OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
 	OC_Template::printExceptionErrorPage($ex);
 }