To resolve this error, you will need to deactivate and reactivate your accounts. Quicken will attempt to connect to the accounts on the server, and if they are not there, it will return the above error. This condition can occur if the accounts are deactivated, and then you open a copy of the file, or restore a backup of the file where the accounts were still activated.
This issue can be caused by accounts in Quicken being activated for Quicken Connect, but no longer exist on the Quicken servers. The attempt to download from this institution has failed (2001 The parameters provided to this api are not valid (key=accountID)). While downloading data from your financial institution using Quicken for Mac, you may receive the following message: