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Try holding down the "select" & "Start" keys simultaneously, this should reset the application for you, it may help.
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I am having the exact same problem with Netflix and same error code but I also get that error code when I try to acces the playstation store. Pushing start and select simultanuosly does not do anything for me. Any other suggestions?
I'm afraid we will get stuck with this 80028f50 error for a while... No one knows how to solve it. Even Sony.
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