Problem description
The form field that is used to specify the AccessKey ID is missing in the PostObject request.
Causes
You initiated a PostObject request that includes a signature, but the form field that is used to specify the AccessKey ID is missing.
If a default V1 signature is included in the PostObject request, the AccessKey ID must be specified in the
OSSAccessKeyIdform field.If a V2 signature is included in the PostObject request, the AccessKey ID must be specified in the
x-oss-access-key-idform field.If an Amazon S3-compatible V2 signature is included in the PostObject request, the AccessKey ID must be specified in the
AWSAccessKeyIdform field.
Examples
You initiated a PostObject request that includes a default V1 signature and the signature authentication in the form field, but the OSSAccessKeyId form field is missing.
Solutions
Specify the AccessKey ID in one of the following form fields based on the signature version that you selected: OSSAccessKeyId, x-oss-access-key-id, and AWSAccessKeyId.
For more information, see PostObject.