void SetFirstPerson(AHalfDeadCharacter* Player);
    
    UFUNCTION(Server, Reliable, WithValidation)
    void Server_SetFirstPerson(AHalfDeadCharacter* Player);
    bool Server_SetFirstPerson_Validate(AHalfDeadCharacter* Player);
    void Server_SetFirstPerson_Implementation(AHalfDeadCharacter* Player);



    virtual void Tick(float DeltaTime) override;

void AHalfDeadCharacter::SetFirstPerson(AHalfDeadCharacter* Player1)
{
    if (Player1->IsDefaultCamera == false) {
        Player1->SetActorRotation(FRotator(0.f, Player1->FirstPersonCamera->GetComponentRotation().Yaw, Player1->GetActorRotation().Roll));

        if (Player1->HasAuthority() == false) {
            Server_SetFirstPerson(Player1);
            
        }
        
    }
}


void AHalfDeadCharacter::Server_SetFirstPerson_Implementation(AHalfDeadCharacter* Player)
{
        Player->SetActorRotation(FRotator(0.f, Player->FirstPersonCamera->GetComponentRotation().Yaw, Player->GetActorRotation().Roll));
        UE_LOG(LogTemp, Warning, TEXT("Client")); UE_LOG(LogTemp, Warning, TEXT("Client"));
}

bool AHalfDeadCharacter::Server_SetFirstPerson_Validate(AHalfDeadCharacter* Player)
{
    return true;
}


void AHalfDeadCharacter::Tick(float DeltaTime)
{
    SetFirstPerson(this);
}

The Problem is that the information from client doesnt share to the server.

i have already been solving this for a 2 hours. It is exactly like in the video.

Something wrong with the Server_SetFirstPerson_Implementation. UELOG is typing, but there is no changes on server