Restic with wasabi repository - Issues after init and first backup

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As an update, I tried to modify the IAM policy following Append-only mode with S3 (Wasabi)
I ended up with:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:ListBucket",
      "Resource": "arn:aws:s3:::xxx"
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:GetObject"
      ],
      "Resource": "arn:aws:s3:::xxx/*"
    },
    {
      "Effect": "Allow",
      "Action": "s3:DeleteObject",
      "Resource": "arn:aws:s3:::xxx/locks/*"
    }
  ]
}

The problem remains.