Problem description
The AccessKeyId field in the x-oss-credential header of a PostObject request contains an invalid value.
Causes
The PostObject request uses Signature Version 4 (V4), but the AccessKeyId value in the x-oss-credential header is invalid.
Examples
The AccessKeyId value contains invalid characters, such as \t (tab).
Solutions
Specify a valid value for the AccessKeyId field in the x-oss-credential header, then resubmit the request.
For the x-oss-credential format and field requirements, see PostObject.
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