Merrill Edge CC-800 It appears one or more account(s) at Merrill Lynch investments have been deleted

Roughly since the beginning of the year, I have gotten this error when trying to update my traditional IRA through Merrill. I have reset the account, deactivated/reactivated, updated third party authorization on the Merrill side - to no avail. The initial account addition fails, but every time I want to update transactions, I get CC-800 .