Has anybody seen "ERROR in Path must be a string. Received undefined" with the yeoman generator?

I created an owa with the yeoman generator, and when I try to build it I see this error in the webpack step:

ERROR in Path must be a string. Received undefined

Is this familiar to anyone?

(While posting this I see OWA Yeoman Generator Webpack Error which I will try tomorrow.)

To close the loop, I updated the generator as mentioned in the link in my past message, and this solved my problem.