UPDATE 06/07/2018: We've tried working with Wealthfront to support accounts with two-factor authentication activated; however, they has not been responsive. While we continue to work on this issue, you will have to turn off two-factor authentication on your Wealthfront account to successfully link with Personal Capital.
We are aware of a connectivity issue with Wealthfront accounts that utilize "two-factor authentication". Our aggregation team is actively working to get this resolved, and we will update our users once we have a resolution.
As a work-around, you can disable the two-factor authentication setting from within your Wealthfront account until we complete the required code changes. Your account should update in the interim.