I started updating anspress 3 and got this (and tried the button again).  Is there some error log or output associated with this?  I have a relatively large data set.

“Aaiyaa! Something went wrong. Please click above button again or report issue to us.”

Also, is there any instructions on what needs to be deactivated before you do the anspress 4 upgrade?  Just anspress-question-answer plugin? Or the category, email, tags plugins for 3 as well?