Invalid
The signer certificate is invalid.
Possible reasons for this failure include: - The document signer certificate is malformed. - A required property is missing from the signer certificate (e.g., common name, country code, signature algorithm, validity period). - The countryCode does not match the countryCode of the root certificate. - The stateOrProvince value does not match the stateOrProvince of the root certificate. - Duplicate extensions detected in the signer certificate.