Acorns won't connect

GMic

Of course the error message and FAQs blame the user typing the login info wrong.
"Oops. Did you mistype your login? CC-503"

Let's skip all the pointing fingers and get right to a fix.
I can successfully log in to Acorns in a Chrome browser just fine.
I have other accounts connected in Quicken that work just fine. So kudos there for the other things that work as intended.

But every time I try Acorns, Quicken fails and tells me to check my login info.
Acorns tech support have redirected me to the third party (you) as they see no issues on their end.

Quicken Anja

Hello @GMic,

Thanks for visiting the Community to tell us about your issue, though I apologize that you are experiencing this.

If the instruction found in this error-specific support article regarding error CC-503 fail to resolve it, then you will need to contact Quicken Support directly for further assistance and possible escalation if they see fit.

We apologize for any inconvenience! Thank you.