Not trying to bump this, but this post always comes up when searching for this issue. I also got this problem yesterday. And I found the solution that I like to share:
Just a little heads up for people who try to install this channel and if it hangs on starting check if the clock is still running in the right bottom corner. If not reboot switch and retry, don't worry this doesn't damage anything. If the clock does run but it still hangs after 10min. well then press the power button on the controller. This will turn of the controller (the lights should be off). Then start mashing the home button. Keep on mashing it even if it turns on, if all goes well the progress bar should continue.
I read this solution somewhere else and it worked for me after it always got stuck on starting.