To see if the maddox Pluto for Channels container is providing an m3u playlist and xml epg data,
you can bring them up in a browser to see if there's any data.
http://192.168.1.240:8080/playlist.m3u
Should let you download the file playlist.m3u channel listing that you can view with a text editor and the contents look like this
#EXTM3U
#EXTINF:0 channel-id="watchfree-movie-binge" tvg-logo="http://images.pluto.tv/channels/5d02dd65a9aa6c5f977bb1e8/colorLogoPNG.png" tvc-guide-art="http://images.pluto.tv/assets/images/default/channel.id-featured-default.jpg?fill=blur&fit=fill&fm=jpg&h=562&q=75&w=1000" tvc-guide-title="WatchFree Movie Binge" tvc-guide-description="Your go-to channel for top free movies. New movies added monthly, from edge-of-your-seat action, date night rom-coms, to laugh-out-loud comedies. Binge them all before they’re gone." group-title="Vizio", WatchFree Movie Binge
http://service-stitcher.clusters.pluto.tv/stitch/hls/channel/########################/master.m3u8?advertisingId=&appName=web&appVersion=unknown&appStoreUrl=&architecture=&buildVersion=&clientTime=0&deviceDNT=0&deviceId=########################&deviceMake=Chrome&deviceModel=web&deviceType=web&deviceVersion=unknown&includeExtendedEvents=false&sid=########################&userId=&serverSideAds=true
#EXTINF:0 channel-id="watchfree-film-festival" tvg-logo="http://images.pluto.tv/channels/########################/colorLogoPNG.png" tvc-guide-art="http://images.pluto.tv/assets/images/default/channel.id-featured-default.jpg?fill=blur&fit=fill&fm=jpg&h=562&q=75&w=1000" tvc-guide-title="WatchFree Film Festival" tvc-guide-description="WatchFree Film Festival is the place to see the best in independent and world cinema. It’s like having an international film fest right in your own home." group-title="Vizio", WatchFree Film Festival
http://service-stitcher.clusters.pluto.tv/stitch/hls/channel/########################/master.m3u8?advertisingId=&appName=web&appVersion=unknown&appStoreUrl=&architecture=&buildVersion=&clientTime=0&deviceDNT=0&deviceId=########################&deviceMake=Chrome&deviceModel=web&deviceType=web&deviceVersion=unknown&includeExtendedEvents=false&sid=########################&userId=&serverSideAds=true
http://192.168.1.240:8080/epg.xml
Should display xml in your browser that looks like this
<tv>
<channel id="watchfree-movie-binge">
<display-name>WatchFree Movie Binge</display-name>
<display-name>2</display-name>
<desc>Your go-to channel for top free movies. New movies added monthly, from edge-of-your-seat action, date night rom-coms, to laugh-out-loud comedies. Binge them all before they’re gone.</desc>
<icon src="http://images.pluto.tv/channels/5d02dd65a9aa6c5f977bb1e8/colorLogoPNG.png"/>
</channel>