If you are still needing assistance and haven't done so already, please take a moment to review the steps available here.
Please let me know if these steps work to resolve the issue.
For whatever it's
worth ... I would not bother attempting to activate any loan or mortgage
account for downloading. (Not discussing
LOC or HELOC accounts here)
loan or mortgage account does NOT have a transaction register. All data shown
in the account come from whatever information the bank downloads to you ... if
this process works at all.
As a result of being
connected, the scheduled payment transaction reminder cannot transfer the
amount of principal paid into the (non existent) account register and must use
a category, usually something like Loan:Principal, instead. The category seems
to vary with the Loan Type you selected when creating the loan account in
Quicken Windows 2018+
you can deactivate an online-connected loan account and regain full control
over your transaction register. However,
you should still review the Scheduled Reminder (or Memorized Payee List entry)
associated with the monthly loan payments to ensure they now transfer Principal
to the loan account register and not to a Category.