Livelink can not get any subject name on window after send

General Feedback & Requests
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1 
if (rig->ProcessFrame(JsonObject, data))
			{
				Client->PushSubjectFrameData_AnyThread(subjectKey, MoveTemp(frameData));
				UE_LOG(LogTemp, Warning, TEXT("sent frame data to: %s "), *subjectKey.SubjectName.ToString());
			}

AM using UDP to connect a client, which send json animation frame data to UE. I can get the json, I can also get the frame data,

but when PushSubjectFrameData_AnyThread to a subjectName, the LiveLink windows doesn’t shows up anything.

How?