@florent said in Backblaze as Remote error Unsupported header 'x-amz-checksum-mode' received for this API call.:
,
requestChecksumCalculation: "WHEN_REQUIRED",
responseChecksumValidation: "WHEN_REQUIRED"
I (previously as @jr-m4) just tried the patch you suggested. And I can confirm that this does indeed make the backup complete successfully!
Great work finding a solution that quicklly!