[Android] Cannot join server --> userId : Invalid

Hello there !
When I try to join a windows packaged game from my android tablet, I receive the following error :

 LogNet: NotifyAcceptedConnection: Name: LVL_Main, TimeStamp: 09/01/17 08:24:54, [UNetConnection] RemoteAddr: 192.168.1.117:58903, Name: IpConnection_17, Driver: GameNetDriver IpNetDriver_2, IsServer: YES, PC: NULL, Owner: NULL
 LogNet: AddClientConnection: Added client connection: [UNetConnection] RemoteAddr: 192.168.1.117:58903, Name: IpConnection_17, Driver: GameNetDriver IpNetDriver_2, IsServer: YES, PC: NULL, Owner: NULL
 LogNet: NotifyAcceptingChannel Control 0 server World /Game/Map/UEDPIE_1_LVL_Main.LVL_Main: Accepted
 LogNet: Remote platform little endian=1
 LogNet: This platform little endian=1
 LogNet: Login request: /Game/Map/LVL_Menu?Name=localhost-0002F9DE01090701002F02394A3EA975 userId: Invalid
 LogNet: Client netspeed is 10000
 LogNet: UNetDriver::TickDispatch: Very long time between ticks. DeltaTime: 0.02, Realtime: 5.10. IpNetDriver_2
 LogNet: UNetDriver::TickDispatch: Very long time between ticks. DeltaTime: 5.09, Realtime: 0.02. IpNetDriver_2
 LogNet: UChannel::ReceivedSequencedBunch: Bunch.bClose == true. ChIndex == 0. Calling ConditionalCleanUp.
 LogNet: UChannel::CleanUp: ChIndex == 0. Closing connection. [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 192.168.1.117:58903, Name: IpConnection_17, Driver: GameNetDriver IpNetDriver_2, IsServer: YES, PC: NULL, Owner: NULL
 LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: 192.168.1.117:58903, Name: IpConnection_17, Driver: GameNetDriver IpNetDriver_2, IsServer: YES, PC: NULL, Owner: NULL, Channels: 2, Time: 2017.09.01-06.25.09
 LogNet: UChannel::Close: Sending CloseBunch. ChIndex == 0. Name: [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 192.168.1.117:58903, Name: IpConnection_17, Driver: GameNetDriver IpNetDriver_2, IsServer: YES, PC: NULL, Owner: NULL

Any helps are welcome !

Thank’s, The SinkThatBoat Team