Error OSLU 1013 with QuickBooks 2024 and TD Bank - Fixed

I have TD Bank and QuickBooks Desktop Pro Plus 2024 R15P.  For me the previously working connection seemed to fail after a QB Update, but that could be a coincidence.  I un-linked the account in QuickBooks and tried to re-link but it failed with a OLSU 1013.  My resolution was to sign into my banks web page and go into "Account Options", then "Account Services".  Scroll down to "Manage Linked Services" and under the heading "Financial Tools" click on "Manage Settings".  I use both Quicken and QuickBooks so I Ignored the section at the top titled Quicken.  Instead scroll down to "Financial Tool Access".    Click on the carrot  ^  to expand "Financial Tool Access" and then click on the link for "Financial Tool Access".  You will see "QuickBooks Windows 2023": Mine said "Approval Pending".  I clicked on it, and it switched to "Authorized".  QuickBooks immediately allowed me to re-link the account.

If you have Quicken don't get mislead by the Quicken section at the top.  It has no effect on QuickBooks.  If yours already says "Authorized" I would suggest deleting it and then try to re-link.