Why wont Plex start this media?

Server Version#: 1.18.4.2171
Player Version#: 4.20.1 - Webplayer
Server running Unraid.
Plex is running in Plex inc Docker.

Hello Plex,

I got a problem with my Plex dont want to play some media. All media is MKV files.

When I start playing the media, it just spinning and nothing happens.

It happens on Webplayer and AndroidTV app.

Transcode log:

<SessionReport version="2" startTime="0" startTimestamp="Jan 17, 2020 09:28:13.507" key="/library/metadata/9547" session="as04kew53hgmwd5p72blqk5u" transcode="7fzr1lb1jd8c8h18ecrdjs5q">
<User id="1" thumb="[https://plex.tv/](https://l.facebook.com/l.php?u=https%3A%2F%2Fplex.tv%2F%3Ffbclid%3DIwAR1I8KpphdC0DeeHPSV7CqBymIitCy-YtNLrTgjqRsTLXNR2BZ3xwV2XKAw&h=AT068cu4EUQ6R36jV7C605VAO_pxuU_JgrJ_1VCdTn-O_JxqzpCsIF1bSv4ZNsOQTjEbPkXdK4rTMewRibXtTtxfNF3tQhroBp8KZikFodCTTd-hhmdE-pLGr_30NRLF1g)" title="User" />
<Player address="IP" device="Windows" machineIdentifier="zz2998lxhuzvt8vbjru8290j" model="hosted" platform="Chrome" platformVersion="78.0" product="Plex Web" remotePublicAddress="IP" state="" title="Chrome" vendor="" version="4.20.1" local="0" relayed="0" secure="1" userID="1" />
<Variants>
<Variant id="2f2c4605-741a-45c8-b490-4b71ebe637f4" targetBitrate="3576" context="streaming" sourceVideoCodec="h264" sourceAudioCodec="ac3" videoDecision="copy" audioDecision="transcode" protocol="dash" container="mp4" videoCodec="h264" audioCodec="aac" audioChannels="2" transcodeHwRequested="0" transcodeHwFullPipeline="1">
<Media id="24303" videoProfile="high" audioChannels="2" audioCodec="aac" bitrate="2957" container="mp4" duration="3439840" height="1080" optimizedForStreaming="1" protocol="dash" videoCodec="h264" videoFrameRate="PAL" videoResolution="1080p" width="1920" selected="1">
<Part deepAnalysisVersion="4" id="24390" requiredBandwidths="5127,4605,3529,3526,3526,3526,3526,3526" videoProfile="high" bitrate="2957" container="mp4" duration="3439840" height="1080" optimizedForStreaming="1" protocol="dash" width="1920" decision="transcode" selected="1">
<Stream bitrate="2701" chromaLocation="left" codec="h264" codedHeight="1088" codedWidth="1920" colorPrimaries="bt709" colorTrc="bt709" default="1" displayTitle="1080i (H.264)" frameRate="25" height="1080" id="58946" requiredBandwidths="4743,4221,3149,3149,3149,3149,3149,3149" streamType="1" width="1920" decision="copy" location="segments-video" />
<Stream bitrate="256" bitrateMode="cbr" channels="2" codec="aac" default="1" displayTitle="English (AC3 5.1)" id="58947" language="English" languageCode="eng" requiredBandwidths="384,384,384,384,384,384,384,384" selected="1" streamType="2" decision="transcode" location="segments-audio" />
</Part>
</Media>
</Variant>
</Variants>
<SegmentList>
<Segment duration="0" startOffset="-1" endOffset="-1">
<Timelines>
<Download startTime="311" fileType="video" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
<Download startTime="311" fileType="audio" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</Timelines>
</Segment>
<Segment duration="5400" startOffset="0" endOffset="5400">
<File name="chunk-stream0-00001.m4s" type="video">
<FileVariant size="1285146" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</File>
<File name="chunk-stream1-00001.m4s" type="audio">
<FileVariant size="170859" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</File>
<Timelines>
<Transcode startTime="177" endTime="351" complete="1" fileType="video" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
<Transcode startTime="177" endTime="351" complete="1" fileType="audio" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</Timelines>
</Segment>
<Segment duration="4760" startOffset="5400" endOffset="10160">
<File name="chunk-stream0-00002.m4s" type="video">
<FileVariant size="1816657" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</File>
<File name="chunk-stream1-00002.m4s" type="audio">
<FileVariant size="154783" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</File>
<Timelines>
<Transcode startTime="351" endTime="496" complete="1" fileType="video" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
<Transcode startTime="351" endTime="496" complete="1" fileType="audio" variant="2f2c4605-741a-45c8-b490-4b71ebe637f4" />
</Timelines>
</Segment>
</SegmentList>
<PlaybackReports />
<StateReports />
<StateReports />
</SessionReport>

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