S3 authentication doesn't work in newer AWS regions

[andrewn]

I'm running the Editor locally with a test S3 bucket in the eu-central-1 Frankfurt (EU) region. Trying to upload files gives me this error:

<Error>
  <Code>InvalidRequest</Code>
  <Message>The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.</Message>
  ...
</Error>

Stackoverflow suggests that this is because we're using an older authentication mechanism that isn't supported in the newer zones.

This isn't a big issue since in production we're using a region where it works but I thought it'd be good to capture this somewhere.

[catarak]

It would probably be good to upgrade this at some point 😄