There is a class tomorrow (2 in fact) 11am EDT and 3PM EDT
See you there -- sorry you are having so much trouble.
on your EC2 system, you could just install webwork2 and pg from git
(move the current webwork2 and pg directories to webwork2old and pgold
and create new webwork2 and pg directories using the
git clone command that I talked about in the very first lecture.