When using Amazon S3 make sure your permissions configuration looks like the below.
Be sure the bucket name is correct. Replace YOURBUCKETNAME in the example.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:ListBucketMultipartUploads",
"s3:ListBucket",
"s3:GetBucketLocation",
"s3:ListMultipartUploadParts"
],
"Resource": [
"arn:aws:s3:::YOURBUCKETNAME/*",
"arn:aws:s3:::YOURBUCKETNAME"
]
}
]
}