mintapi: "challenge required" error

All was working great; today Mint forced me to change password.

I updated password, but mintapi says mintapi.api.MintException: Challenge required, please log in to Mint.com manually and complete the captcha.

I re-logged in in Chrome, got the email verification code, confirmed, etc., then copied values for ius_session from accounts.intuit.com cookies and thx_guid from pf.intuit.com cookies.

But I still get the same error.

(I was never able to get selenium to work.)