Cloud Connector on HANA Express issue

[vodela]

Tutorials: https://developers.sap.com/tutorials/cp-launchpad-federation-connectivity.html
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I am facing the following issue in the cloud connector on HANA Express.

My set up is Windows Virtual box using standard HANA vm import. I have installed the cloud connector and JDK11. From my pc I am able to connect to hana express cloud connector using https://hxehost:8443. In my /etc/hosts file I have the following as mentioned in the SAP help for US east AWS.

52.23.189.23 connectivitynotification.cf.us10.hana.ondemand.com
52.23.189.23 connectivitycertsigning.cf.us10.hana.ondemand.com
52.23.189.23 connectivitytunnel.cf.us10.hana.ondemand.com
157.133.97.47 connectivitynotification.ap1.hana.ondemand.com

When I try to save the Cloud Connector setting to my cloud subaccount I get the following error I get the following message

500 Failed to sign the Cloud Connector certificate for subaccount 24d2fc33-c687-435f-8499-39cc7cd237c3@cf.us10.hana.ondemand.com. Verify configuration and proxy settings. See ''Log And Trace Files'' and in particular ljs_trace.log for details. Consult SAP note 2460641 for possible remedies.

The log file shows the following
2022-01-09 01:03:16,022 -0800#INFO#org.apache.http.impl.execchain.RetryExec#https-jsse-nio2-8443-exec-9# #Retrying request to {s}->https://connectivitycertsigning.cf.us10.hana.ondemand.com:443
2022-01-09 01:03:25,023 -0800#INFO#com.sap.scc.config#https-jsse-nio2-8443-exec-9# #Stopping service channels on 24d2fc33-c687-435f-8499-39cc7cd237c3[HXEHOST]@cf.us10.hana.ondemand.com
2022-01-09 01:03:25,024 -0800#ERROR#com.sap.scc#https-jsse-nio2-8443-exec-9# #Preparation of tunnel certificate for 24d2fc33-c687-435f-8499-39cc7cd237c3@cf.us10.hana.ondemand.com account failed.
com.sap.scc.servlets.CriticalSccException: Preparation of tunnel certificate for 24d2fc33-c687-435f-8499-39cc7cd237c3@cf.us10.hana.ondemand.com account failed.

When I try to ping connectivitynotification.ap1.hana.ondemand.com or connectivitynotification.cf.us10.hana.ondemand.com from hana express it fails as well

Best regards

Ramesh