Sample Media Cloud S3 IAM Policy

policy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:DeleteObjectTagging",
                "s3:ListBucketMultipartUploads",
                "s3:DeleteObjectVersion",
                "s3:ListBucket",
                "s3:DeleteObjectVersionTagging",
                "s3:GetBucketAcl",
                "s3:ListMultipartUploadParts",
                "s3:PutObject",
                "s3:GetObjectAcl",
                "s3:GetObject",
                "s3:AbortMultipartUpload",
                "s3:DeleteObject",
                "s3:GetBucketLocation",
                "s3:PutObjectAcl"
            ],
            "Resource": [
                "arn:aws:s3:::YOURBUCKET/*",
                "arn:aws:s3:::YOURBUCKET"
            ]
        },
        {
            "Effect": "Allow",
            "Action": "s3:HeadBucket",
            "Resource": "*"
        }
    ]
}

This solved my problem: https://stackoverflow.com/questions/70333681/for-an-amazon-s3-bucket-deplolyent-from-guithub-how-do-i-fix-the-error-accesscon