Help using Q&A plugin

Hello, I own a web business and thought the Q&A plugin would be a great feature for my website.
However, I am not sure how to run it?
I go to http://domain/questions/ask and nothing comes up
Adding a new answer - then says 'internal 500 server error'

Can someone please offer solutions to get this Q&A plugin to work? Do I add a code to a page, to display the Q & Answers?

Any help appreciated.