AlibabaCloud\Tea\Utils\Utils::isUnset(): Argument #1 ($value) cannot be passed by reference

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Error

AlibabaCloud\Tea\Utils\Utils::isUnset(): Argument #1 ($value) cannot be passed by reference

at vendor/alibabacloud/darabonba-openapi/src/OpenApiClient.php:726
722▕ $_lastRequest = $_request;
723▕ $_response = Tea::send($_request, $_runtime);
724▕ if (Utils::is4xx($_response->statusCode) || Utils::is5xx($_response->statusCode)) {
725▕ $err = [];
➜ 726▕ if (!Utils::isUnset(@$_response->headers['content-type']) && Utils::equalString(@$_response->headers['content-type'], 'text/xml;charset=utf-8')) {
727▕ $_str = Utils::readAsString($_response->body);
728▕ $respMap = XML::parseXml($_str, null);
729▕ $err = Utils::assertAsMap(@$respMap['Error']);