How to add a Replicated component to a replicated actor

How can i add a Replicated component to a replicated Actor?
I know that question is simple and i never have problems with it until yesterday… it just disconnects everytime i try it
So i think i do something wrong

My way how to add a replicated component:
BeginPlay()->HasAuthority()->AddReplicatedComponent()
The result of that is that every player gets disconnected from the server.
With Error:
LogNetTraffic: Error: ReadContentBlockHeader: Stably named sub-object not found. Component: [7]/Temp/UEDPIE_2_Untitled_1.[5]Untitled_1.[3]PersistentLevel.[17]TestActor_192.[33]NODE_AddTestComponent-0_0, Actor: TestActor_192

This happens in 4.20 and 4.19

So how can i add a replicated component without disconnecting all clients ??