api-console giving blank white screen for version 6.6.5 and works only for 6.1.1

api-console build -t "RAML 1.0" -n "6.6.5" suddenly gives me blank white screen , whereas aapi-console build -t "RAML 1.0" -n "6.1.1" working now , but this 6.6.5 was working fine before a month or so.Any thoughts on this?
Note - using api-console-cli@3.0.0