System.getModule("com.vmware.library.vcac").getUserEntityByName(iaasHost,name) throws null pointer exception

Hi All,

var userEntity = System.getModule("com.vmware.library.vcac").getUserEntityByName(iaasHost,name); throws null pointer exception. In getUserEntityByName action it throws at vCACEntityManager

  .readModelEntitiesByCustomFilter(iaasHost.id, modelName, entitySetName, properties, headers); It pretty null pointer exception for createModelEntity too. It used to work before not sure what changed in the environment. I have tried rebooting VCAC Portal, IaaS Server, db etc. 

There is similar discussion https://communities.vmware.com/message/2295520. VCAC Plugin is 6.1 in my env and it has worked before.

Any help appreciated.