When I try to Chromecast my M1 from my iPhone or iPad... the initial splashscreen that states "Slingplayer" comes up .... but then it times out completely and closes. I never get the feed at all.
I am able to Chromecast everything else (HBO GO, Netflix, Etc)... so I know the Chromecast is working.
I can also use my Slingbox with my Roku.. so I know the Slingbox is working. It also does come up on the iPhone / iPad.... just unable to use Chromecast.