The HTTP 500 code is returned when trying to access the AdminUI using REST API.
The Rest Service log reports the errors:
[2024-02-19 11:00:41][ERROR][AuthenticationService:com.ca.siteminder.securityservice.AuthenticationService.doPost(AuthenticationService.java:144)][SMSECSRV_006-Error while trying to authenticate.]
java.lang.RuntimeException: [facility=0 severity=3 reason=0 reason=0 status=8 message=Tunnel Agent failure]
Caused by: com.netegrity.sdk.apiutil.SmApiException: Tunnel Agent failure
at com.ca.siteminder.restapi.common.AgentApiHandler.authenticateLegacyAdmin(AgentApiHandler.java:289) ~[smrestapi-common-1.0.jar:?]