#!/bin/bash

wrapper=`md5sum /defaults/plex_wrapper_transcoder | awk '{print $1}'`
current=`md5sum /usr/lib/plexmediaserver/Resources/Plex\ New\ Transcoder | awk '{print $1}'`

if [ "$wrapper" != "$current" ]; then
   echo "detected Plex Transcoder are not wrapped!! lets replace to remote transcoder"
   mv /usr/lib/plexmediaserver/Resources/Plex\ New\ Transcoder /usr/lib/plexmediaserver/Resources/plex_transcoder
   cp /defaults/plex_wrapper_transcoder /usr/lib/plexmediaserver/Resources/Plex\ New\ Transcoder
   chmod +x /usr/lib/plexmediaserver/Resources/Plex\ New\ Transcoder
fi

#!/bin/bash

wrapper=`md5sum /defaults/plex_wrapper_transcoder | awk '{print $1}'`
current=`md5sum /usr/lib/plexmediaserver/Resources/Plex\ Transcoder | awk '{print $1}'`

if [ "$wrapper" != "$current" ]; then
   echo "detected Plex Transcoder are not wrapped!! lets replace to remote transcoder"
   mv /usr/lib/plexmediaserver/Resources/Plex\ Transcoder /usr/lib/plexmediaserver/Resources/plex_transcoder
   cp /defaults/plex_wrapper_transcoder /usr/lib/plexmediaserver/Resources/Plex\ Transcoder
   chmod +x /usr/lib/plexmediaserver/Resources/Plex\ Transcoder
fi

Replace Transcoder New Plex Version 1.0.0.2261
Replace Transcoder New Plex Version 1.0.0.2261

Plex guys renamed Plex New Transcoder to Plex Transcoder so this docker fail to wrap the transcoder.
With this fix it should work again