Xfinity stream app not working

Hello, I have a Roku device in my workout room and the xfinity stream app stopped working last week. I have tried deleting the app and re-downloading. I’ve reset the Roku device. I’ve unplugged the Roku and plugged it back in. Nothing works. Why are there always problems with xfinity stream? Does anyone have a fix? About ready to dump xfinity altogether, for the price we pay for it.