1. User information error: Signature failed due to incorrect user information entered or incorrect signature operation.
2. Issues related to authentication tools: It is necessary to confirm whether the authentication tool version is correct, whether the enterprise online banking account is successfully bound, and whether the authentication tool is within the validity period.
3. Upgrade of BOC's new enterprise online banking plug-in: It is the enterprise online banking of Bank of China, and needs to be upgraded to the latest BOC's new enterprise online banking plug-in.