I'm trying to call Google AdManager from Salesforce over SOAP and when I do a callout to one of the methods I get this "System.CalloutException: Web service callout failed: Unable to parse callout response. Apex type not found for element id".
Was trying to "google" the error but I can't seem to find a solution for this, maybe someone can help me out here?

Calling this getCurrentUser() method:

public class UserServiceInterfacePort {
        public String endpoint_x = 'callout:AdManager/v201911/UserService';
        public Map<String,String> inputHttpHeaders_x;
        public Map<String,String> outputHttpHeaders_x;
        public String clientCertName_x;
        public String clientCert_x;
        public String clientCertPasswd_x;
        public Integer timeout_x;
        public UserService.SoapRequestHeader RequestHeader;
        public UserService.SoapResponseHeader ResponseHeader;
        private String RequestHeader_hns = 'RequestHeader=https://www.google.com/apis/ads/publisher/v201911';
        private String ResponseHeader_hns = 'ResponseHeader=https://www.google.com/apis/ads/publisher/v201911';
        private String[] ns_map_type_info = new String[]{'https://www.google.com/apis/ads/publisher/v201911', 'UserService'};
        public UserService.User_x getCurrentUser() {
            UserService.getCurrentUser_element request_x = new UserService.getCurrentUser_element();
            UserService.getCurrentUserResponse_element response_x;
            Map<String, UserService.getCurrentUserResponse_element> response_map_x = new Map<String, UserService.getCurrentUserResponse_element>();
            response_map_x.put('response_x', response_x);
            WebServiceCallout.invoke(
              this,
              request_x,
              response_map_x,
              new String[]{endpoint_x,
              '',
              'https://www.google.com/apis/ads/publisher/v201911',
              'getCurrentUser',
              'https://www.google.com/apis/ads/publisher/v201911',
              'getCurrentUserResponse',
              'UserService.getCurrentUserResponse_element'}
            );
            response_x = response_map_x.get('response_x');
            return response_x.rval;
        }

Expecting back this class:

public class User_x {
        public Boolean isActive;
        public Boolean isEmailNotificationAllowed;
        public String externalId;
        public Boolean isServiceAccount;
        public String ordersUiLocalTimeZoneId;
        private String[] isActive_type_info = new String[]{'isActive','https://www.google.com/apis/ads/publisher/v201911',null,'0','1','false'};
        private String[] isEmailNotificationAllowed_type_info = new String[]{'isEmailNotificationAllowed','https://www.google.com/apis/ads/publisher/v201911',null,'0','1','false'};
        private String[] externalId_type_info = new String[]{'externalId','https://www.google.com/apis/ads/publisher/v201911',null,'0','1','false'};
        private String[] isServiceAccount_type_info = new String[]{'isServiceAccount','https://www.google.com/apis/ads/publisher/v201911',null,'0','1','false'};
        private String[] ordersUiLocalTimeZoneId_type_info = new String[]{'ordersUiLocalTimeZoneId','https://www.google.com/apis/ads/publisher/v201911',null,'0','1','false'};
        private String[] apex_schema_type_info = new String[]{'https://www.google.com/apis/ads/publisher/v201911','true','false'};
        private String[] field_order_type_info = new String[]{'isActive','isEmailNotificationAllowed','externalId','isServiceAccount','ordersUiLocalTimeZoneId'};
    }

Response I'm getting from debug log:

CALLOUT_RESPONSE|[458]|<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Header><ResponseHeader xmlns="https://www.google.com/apis/ads/publisher/v201911"><requestId>e0f13da33a0db674b118a930cf0kij54</requestId><responseTime>685</responseTime></ResponseHeader></soap:Header><soap:Body><getCurrentUserResponse xmlns="https://www.google.com/apis/ads/publisher/v201911"><rval><id>245547652</id><name>Nerijus Urbietis</name><email>nerijus.urbietis@:).ie</email><roleId>-1</roleId><roleName>Administrator</roleName><isActive>true</isActive><isEmailNotificationAllowed>false</isEmailNotificationAllowed><isServiceAccount>false</isServiceAccount></rval></getCurrentUserResponse></soap:Body></soap:Envelope>