Hi everyone, just downloaded and installed XenForo 2.2. I was in the process of importing a vB 3.8.8 database, when it quit, and now all I get when I browse to the XF forum URL is "An unexpected error occurred. Please try again later."
I managed to recover by going to [my_forum_url]/install, logging in using my admin credentials (which had been transferred from the old DB to the new), and rebuilding the master table.
From there, it appears the DB server timed out or something. Lots of failed queries in the log. Now I'm continuing the conversion from where it left off.