In AWS SDK for JavaScript v3.729.0, they released changes to the S3 client that adopts new default integrity protections.
This automatically crashes every R2 upload. See more here:
aws/aws-sdk-js-v3#6810
AWS's response is awful; they don't care.
We have followed up with some of the fixes and implemented them in the repo.
Please make sure you upgrade to the latest docker or you might not be able to use Postiz.