Hello @n0rg
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. Are you trying to connect a new account to Quicken or an existing accounts? Currently we are experiencing issues with Vanguard that may be the reason you're having difficulty but if we could get some more details we can see if that is the case.
Once you have the chance please let us know more details and we'll what else we can find.
Thanks,
Quicken Francisco
20210217 08:18:21: Parse error. Current object: Null Object
20210217 19:17:16: We’re sorry, the server is experiencing an internal error. Try again now, or wait and try later.