I get this error in Firefox when I (try to) implement password encryption as per Agile Web Development.
I put "require 'digest/sha2'" at the top of my user controller as it suggests, but when I try to edit then save a user record, I get the message in the subject of this post.
The Ruby language installation has the ../digest/sha2 subdirectory, so am I supposed to tell rails where it is, or do something else to make it available?
Thanks in advance for any help. --Fred
