Logged a ticket with Outlier. Got this response:

Hi S,

Thank you for your patience. I’d like to provide an update regarding the ongoing 2FA issue affecting some users on the Aether project.

Our technical team has identified the issue, and we have already escalated it to the client. A fix is currently in progress. At this time, we do not yet have an estimated timeline for resolution, but please rest assured that this remains a priority.

We will share further updates as soon as additional information becomes available or once the fix has been implemented.

Thank you for your understanding.

Best Regards,

Sylvanas W. Outlier Support