Yes same underlying issue
Jul 25, 2018 20:27:19.630 [17460] ERROR - [Transcoder] [dash @ 03c44280] Unable to open http://127.0.0.1:32400/video/:/transcode/session/vidx8qqz4g2laj0tre21abji/57149769-f5df-43a4-a2b1-ab9b95bace40/manifest for writing
Jul 25, 2018 20:27:19.635 [10396] ERROR - [Transcoder] av_interleaved_write_frame(): Unknown error
Jul 25, 2018 20:27:19.670 [6768] DEBUG - Streaming Resource: Terminated session 0x8816138:poyc6s0zue1h9f7bod7jz26a with reason Conversion failed. The transcoder exited due to an error.
It looks like the issue introduced by windows 10 update KB4338819 which Microsoft superseded with a second update 6 days later: KB4345421.
Make sure you have the later windows 10 update applied. You should be able to install it manually
