S3 backup fails: Unsupported header 'x-amz-checksum-crc32' received for this API call.

Symptoms

• Upon creating backup and uploading to Backblaze S3-like storage, the backup fails and the following error can be seen in Tools & Settings > Backup Manager:

  Unable to create the remote backup: Transport error: Extension transport: ext://s3-backup/server/: Unsupported header 'x-amz-checksum-crc32' received for this API call.

Cause

AWS has updated the AWS-CLI, which changed some parameters.

Resolution

1. Log into your Plesk server.

2. Edit the /usr/local/psa/admin/conf/panel.ini file.

   Note: If the [ext-s3-backup] section does not exist, create it.

3. Add the following lines to the [ext-s3-backup] section:

   [ext-s3-backup]
   request_checksum_calculation = WHEN_REQUIRED
   response_checksum_validation = WHEN_REQUIRED
   RequestChecksumCalculation = WHEN_REQUIRED
   ResponseChecksumValidation = WHEN_REQUIRED