Sentinel Error

Hi All,
My team has been struggling to get the Test complete V14.6 working on CDD.

Currently the issue is we are not able to validate the floating license .
On accessing the Sentinel admin control center url (http://localhost:1947) , we get the below error-

This site can’t be reached localhost refused to connect. Try: Checking
the connection Checking the proxy and the firewall

P.S Test complete 14.6 is not installed from manage artifacts but from a set up on our shared drive location

We would really appreciate any help/pointers regarding the above issue .