AWS S3 Upload PUT - S3 bucket with ObjectLockConfiguration

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Hi,
We would like to use the AWS activity package for one of our automation. The S3 bucket has a ObjectLockConfiguration to set a retention time on the bucket objects. Therefore we have to set the MD5 value as header for every PUT request (PutObject - Amazon Simple Storage Service).
Unfortunately we are getting following error message and I cannot see the possibility to add a custom header to the request.

Upload Object from File: Failed to upload the s3 object from a file: Content-MD5 OR x-amz-checksum- HTTP header is required for Put Object requests with Object Lock parameters
Error: Content-MD5 OR x-amz-checksum- HTTP header is required for Put Object requests with Object Lock parameters

Any idea how to deal/fix with this?