Xfinity stream app on Roku stopped working

The xfinity stream app on Roku just stopped working all of a sudden in the middle of watching it. We did all the steps to attempt to get it back up and running. We restarted Roku, redownloaded the app, signed in and out, checked connections, turned all off then on again, ect. All else is functioning properly. Xfinity stream is working on cell phone working on same wifi. What could the issue be?