It would help to provide some more information, like which version of PSE and which operating system, but for the 150:30:
For the error 400, are you trying to sign in to photoshop.com? That is dead and gone, has been for very nearly a year, so there's nothing there to sign in to anymore.
Since your other post is in the PSE forum, I was assuming that's what you're asking about, not PS. Sorry if that's not the case.