Peacock won’t play movies or shows

When I open peacock using the x1 remote, and select a. show or movie I want to watch, only the trailer will play...when I click on resume, the buffering circle comes on and attempts to play, but then re-directs back to the overview screen and starts to play the trailer. This only
Happens when I attempt to watch thru the Comcast box, not when I watch thru my phone app—and my Samsung television doesn’t support the peacock app so it’s important that it works with my x1!

How can this be fixed??