MWS Analytic engine connection issue

Products / Components: MWS 10.15, AE 10.15

Description:
I’m trying to configure Analytic Engine within MWS. The following have been done:

  1. AE installed and is running ok - checked in two ways:
    MWS → System Information → On-Line is green
    Tried invoking the URL: https://<host:port>/services/monitor.wsdl and this displays the WSDL file

  2. Configured AE within the MWS in MWS → Administration → System-Wide → Define environments

Now, when I try to access the MWS → Monitoring → System-Wide → Problems, I see the below error:

Analytic Engine Error. com.webMethods.caf.wsserver.auth.saml.SAMLAssertionNotValidException: SAML Assertion has an invalid authentication method, method: {0}

Troubleshooting:
MWS → Administration → System-Wide → Define environments → Environment Configuration → Configure Servers → Analytic Engine v10.15.0.0 → Station Settings: SAML Enforced option is checked

Errors:
I have seen the below errors on the AE server - info.log

[ERROR] com.webMethods.caf.wsserver.auth.DefaultAuthInterceptor:: intercept exception: java.lang.RuntimeException: com.webMethods.caf.wsserver.auth.saml.SAMLAssertionNotValidException: SAML Assertion has an invalid authentication method, method: {0}
[ERROR] com.webMethods.caf.wsserver.auth.saml.SamlUtils:: SOAP Exception: Unable to send request to https://MWShost:port/services/SAML
[ERROR] com.webMethods.caf.wsserver.auth.saml.SamlUtils:: No SOAP response
[ERROR] com.webMethods.caf.wsserver.auth.DefaultAuthInterceptor:: intercept exception: java.lang.RuntimeException: com.webMethods.caf.wsserver.auth.saml.SAMLAssertionNotValidException: SAML Assertion has an invalid authentication method, method: {0}

Not sure if I have missed any config or something.

Thanks and Regards
Nanda