@nrlingam  can you share a screenshot of the error if you have, does it say failed to reach genesis?

Do you fulfil the requirements for 2 node clusters https://portal.nutanix.com/page/documents/details/?targetId=Web-Console-Guide-Prism-v5_15:wc-cluster-two-node-c.html

Also can you try this 
Ping CVM - CVM both sides 
Ping host to host both sides 

Ping CVM to Host both CVM to Both host 

and Ping host to CVM, both host to both CVM. 

If everything is working try creating a cluster again.