Cisco ISE cannot register to smart license

[jewfcb001]

Hi All,
Cisco ISE out of sync license to smart license . I try to de-register license and register license again . But
Cisco ISE appear 
"Invalid response from licensing cloud. PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target " 
this log . Please help for solve this issue .

ISE Version 3.3 Patch 4

Thank you.

[Mark Elsen]

     - Looks like a bug ; you are not mentioning the ISE version = ?

  M.

[jewfcb001]

@Mark Elsen 
Thank you for response.

Cisco ISE Version 3.3 Patch 4

[Mark Elsen]

  - FYI : https://www.cisco.com/c/en/us/support/docs/security/identity-services-engine/222337-integrate-ise-with-smart-licensing-serve.html#toc-hId-936966481

                    I would advise to look into :
 >...ISE Logging Attributes to be Set to Debug Level
              License           (ise-psc.log)
              admin-license (ise-psc.log)

   M.