Q&A Plugin Not Showing Up on /questions

So I install the plugin and activate it, but when I go to /questions I get “Not Found” — weirder still when I type /questions/ask — it sits there for a second, then redirects me to a blog post on my site that has the word “ask” in the title.

I could have sworn I had this working at one point a few weeks ago — not sure what’s changed.