Adding node while updating from ARIS 98.7 to 08.9

Hello,

I was trying to add node localhost while updating the ARIS agent from 98.7 to 98.9 in ACC usinfg the command

add node localhost localhost:80 "system""manager"

I get an error :

unable to add node localhost to ensemble.

Couldnot connect to http://localhost:80/rest. Make sure that an agent is running on this machine and that the specified port is correct.Also check if you used the right protocol to communicate with the agent <you used HTTP, try HTTPS>.

How to resolve this? Please help