S3 bucket policy errors
It looks like you tried to compile multiple policies into one.
Each original had a statement with its array of statements and you nested them.

This (untested) should work with each statement block within the array of Statement of the policy:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:ListBucket",
        "s3:GetBucketLocation",
        "s3:ListBucketMultipartUploads"
      ],
      "Resource": "arn:aws:s3:::&lt;my bucket&gt;",
      "Principal": {
        "AWS": [
          "arn:aws:iam::560184616970:user/&lt;my username&gt;"
        ]
      }
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:AbortMultipartUpload",
        "s3:DeleteObject",
        "s3:DeleteObjectVersion",
        "s3:GetObject",
        "s3:GetObjectAcl",
        "s3:GetObjectVersion",
        "s3:GetObjectVersionAcl",
        "s3:PutObject",
        "s3:PutObjectAcl",
        "s3:PutObjectAclVersion"
      ],
      "Resource": "arn:aws:s3:::&lt;my-bucket&gt;/*",
      "Principal": {
        "AWS": [
          "arn:aws:iam::560184616970:user/&lt;my-username&gt;"
        ]
      }
    },
    {
      "Effect": "Allow",
      "Action": "s3:ListAllMyBuckets",
      "Resource": "*"
    }
  ]
}


An alternative could be to use aws bucket policy generator