Thank you for posting something you'd already solved - this is how we can build out good community resources together!
Did you also pull the latest version of the code before recompiling? The
summarize method was added in the initial version 0.1 commit, and would expect to get this error if you were running a pre-0.1 version. If not, it's possible that the version mismatch triggered some odd behavior here, and I'm curious how!
We can add something to docs / FAQ as soon as we pin down the root cause.