I recently converted my old Pre classic to a nearly new Pre Plus on Sprint but cannot login into or create a new profile while running 2.1.
Everything appears to have gone as planned and I'm on 1.4.5 successfully. However, I've tried the upgrade to 2.1 multiple times. Each time it appears successful except that I cannot log into my old profile nor can I create a new profile while running 2.1. Doctor back to 1.4.5 and everything works just fine.
It's not clear if the problem is because of the donor device was an AT&T Pre Plus, or if there's something obvious that I just keep looking over. I've been over and over the wiki and the forum posts. Feel free to tell me I'm being dense and point me to a link.
BTW I'm running the ./scripts/meta-sprint-pre-2.1.0 script from Ubuntu as seen on the wiki page WebOS 2 Upgrade - WebOS Internals