This can be fixed by upgrading AWS CLI:
$ sudo pip install --upgrade awscli
An error occurred (InvalidRequest) when calling the CreateMultipartUpload operation: You are attempting to operate on a bucket in a region that requires Signature Version 4. You can fix this issue by explicitly providing the correct region location using the --region argument, the AWS_DEFAULT_REGION environment variable, or the region variable in the AWS CLI configuration file. You can get the bucket's location by running "aws s3api get-bucket-location --bucket BUCKET".
Parameter validation failed:
Invalid type for parameter UploadId, value: None, type: <type 'NoneType'>, valid types: <type 'basestring'>