Problem description
The error is returned if the prefix parameter in a request, such as ListBuckets, is invalid.
Causes
The prefix parameter is invalid.
Examples
The prefix parameter specifies the prefix that the names of the buckets that you want to return must contain for a request, such as ListBuckets. If this parameter is not specified, prefixes are not used to filter the buckets that you want to return. In the following example, prefix is set to my.
GET /?prefix=my&max-keys=10 HTTP/1.1
Date: Thu, 15 May 2014 11:18:32 GMT
Host: oss-cn-hangzhou.aliyuncs.com
Authorization: OSS qn6q**************:77Dv****************Solutions
Make sure that the value of prefix is valid.