ComfortUpdate not working on bitnami+AWS image - "unkown_destination_build_5"

Applied new Key and then attempted comfortupdate.
Update fails with "unkown_destination_build_5" error message.

bitnami/AWS build using LimeSurvey version 3.0.5+180118.

ComfortUpdate indicates it needs later version for a security update.
How at risk is this base installation from hackers?

How can I perform the update if the ComfortUpdate is non-functioning?

The issue is on the backend.
Did happend before.
I would expect a fix in the next 24h.
bugs.limesurvey.org/view.php?id=13262

You can do a manual update. You need to download the installation package.
Instructions can be found in the manual.
www.limesurvey.org/manual/Upgrading_from...r_version_changes.29