Having the same issue. I click the Pandora app on my new Roku Express 4K and I get the Unexpected Error nonsense. I can't even get to the login page. The Roku forum is no help, they have offered no solutions and one of the Roku moderators even tried to blame this error on Pandora since you guys write the Roku channel. It seems something in the Pandora app is conflicting with the hardware in this particular Roku device. Pandora you need to reach out to Roku and discuss this problem and both of you come up with a solution. So far neither Roku nor Pandora has come up with a fix and each company pointing the finger at the other will never solve the problem and only hurt customers. I have tried all the troubleshooting steps they don't work! Pandora please figure this out and make it a top priority. ... View more