I ran an upgrade of my Ubuntu machine from 12.04 to 14.04 and afterwards, I noticed that my Trac stopped working, giving me this error message on the webpage:
"AttributeError: Cannot find an implementation of the "IRequestHandler" interface named "WikiModule". Please update the option trac.default_handler in trac.ini."
I googled around a lot to see if others experienced this problem, but found no solution. Did anyone encounter and solve this?