SOLUTION: Conversion failed. The transcoder exited due to an error

Sorry for delay in looking at your logs. Is it still an issue?
Your transcoder failure is because of the windows update bug covered by the forum topic linked in other posts in this thread

Extract from your log

Jul 27, 2018 19:03:38.049 [26228] ERROR - [Transcoder] [stream_segment,ssegment @ 0391f400] Failed to open segment list 'http://127.0.0.1:32400/video/:/transcode/session/m55z4hwryw5tp0uqshmme5j9/cdc74514-522c-4e27-82e6-5663ca3008bd/seglist'
Jul 27, 2018 19:03:38.069 [27616] ERROR - [Transcoder] av_interleaved_write_frame(): Unknown error
Jul 27, 2018 19:03:38.077 [31952] ERROR - [Transcoder] av_interleaved_write_frame(): Invalid argument

See linked solution post to this forum topic