Hi @Emil.. The issue is fixed.
I was getting the following error at /var/log/ambari-server/ambari-server.log
[qtp-ambari-client-38026] BaseManagementHandler:57 - Caught a system exception while attempting to create a resource: Error occured during stack advisor command invocation: Cannot create /var/run/ambari-server/stack-recommendations
org.apache.ambari.server.controller.spi.SystemException: Error occured during stack advisor command invocation: Cannot create /var/run/ambari-server/stack-recommendations
Created stack-recommendations location explicitly and it's fixed now.
Thank you,
Shiwang