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I don't work for Sony. Just a gamer helping others.
I am having log in issues with this app on my Xperia Z1s. The app requests to be loged into PSN, after login to PSN through the web browser it says "You have successfully signed in. Return to the previous applocation to continue." But then when I open the ctOS mobile app it brings me back to the PSN sign in screen, or sometimes it just freezes. After restarting the app I then get an error warning.