After last recent update, bot only replies with Huh ?

[databloom]

I abandoned running armchair-expert in a docker container for now but thought I'd play with using youtube captions as a source for data. I've managed to load the data ok, but no matter what I say to the bot, it either replies back with the a single noun of what I wrote or a 'huh ?' .
I'd love to hear ideas on how to debug this. Thanks !