Problem description
The value of the AccessKeyId field in the request is invalid.
Causes
You initiated a request that included the signature, but the value of the AccessKeyId field is invalid.
Examples
You initiated a request that included the signature in the Authorization header, but the AccessKeyId field of the Authorization request header contains invalid characters.
Solutions
Make sure that the value of the AccessKeyId field in the Authorization header or the URL is valid.
For more information, see Include signatures in the Authorization header and Add signatures to URLs.