Error - Playback stopped because the connection to the Plex Media Server has been lost

Hi,
Im using PLEX on my Windows 10 PC and trying to watch videos on PLEX installed on my Android-Based streamer.
Everything works well until about 20-30 min of watching. Then i have got the messege: "Playback stopped because the connection to the Plex Media Server has been lost". When i investigated the log file i noticed the following error: "handle_stream_read error 1236 The network connection was aborted by the local system". I think this is the origin of the problem but i cant fully figure it.
I attached the full log file.
I'm hoping you can help me with this.
Thanks.