This issue has been resolved.

Any users still encountering errors deploying, please check and make sure your flyctl version is >=v0.3.180, and update with fly version update if not.

We have seen a strong decrease in errors for most users. We are seeing some 401 errors still for users using old versions of flyctl.

Users encountering a 401 error and using a version under v0.3.180, should run flyctl version update to update to the latest flyctl version.

A fix has been deployed and we are monitoring the results. We are seeing a decrease in 401 / 499 errors when deploying.

This issue primarily impacted users deploying apps via the Fly Dashboard, deploys using flyctl versions lower than v0.3.180, and deploys involving building very large images.