Clearing the cookies did not fix my problem. I contacted support last week and all they kept telling me was that I was not an HBO subscriber. No matter how many times I explained that I did sign up for HBO max through downloading the app to my phone, not through xfinity. Last week the screen would go black when I launched the app. Today it just keeps telling me that there was an error with the app and gives me the choice to relaunch or exit. Relaunch gives me a blank purple screen. No choice to log in. No choice to find content.