Information about errors during data delivery.
- (void)onError:(int)errorCode :(NSString*)description;
func onError(_ errorCode: Int32, _ description: String)
The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.
ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.