You have a Windows Server 2008 R2 or later version running as a Distributed Scan Management (DSM) Scan Server. In the DSM Scan Server Configuration Wizard, you configure the Security Settings for "Do not authenticate using certificates (Less Secure)".
The scanner has an invalid certificate.
With this configuration, DSM Scan Server will reject the scan job transmission.
Delete the invalid certificate on the scanner.
Note: To perform DSM Scan, WSD implementation is required.