Starz activation for laptops, Roku’s etc has been broken for half a year. Please straighten out your problems with them. They say it’s on your end. Cannot use the Starz channel on Roku or the one on the IPad because Xfinity is not listed.
Hello Eor-Eor, we don't have an agreement with Starz to stream their content from their app. You can download our Xfinity Stream app to view all of your favorite channels including Starz on your Roku.