As of October 2025, the "Request failed with status code 401" error message comes up when trying to log into Oode.
The login credentials I tried were valid (at least when they last worked a year ago).

This looks like a repeat of that old Appsumo-deal-and-disappear experience. It seems that Oode product is still online, in accepting new registrations, and perhaps is functioning, but Sumoling LTD accounts are left hanging and blocked or without access.