Error When Connecting to Vanguard (QCS-0400-6)

sandglass
sandglass Member
edited October 10 in Adding and Updating Accounts

New error is showing up when attempting to connect to Vanguard through both the desktop app (Firefox, Windows 10) and mobile app (Android). Attempted the usual logout and log back in for the desktop app and the mobile app was newly installed. I also revoked access in Vanguard settings and tried again and received the same error.

I found the status code 400 response in dev tools and it had the title/error code: "Parameter all credential form fields must be specified for this request."

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  • Coach Jon
    Coach Jon Moderator admin

    Hello @sandglass,

    Thank you for reaching out! From our side, it looks like you may be using an instance that is no longer supported for Vanguard. I would check if the other Vanguard instances available within Quicken Simplifi work for you.

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    Let us know how that goes!

    -Coach Jon

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