invalid character '<' looking for beginning of value json unmarshal failed

hi everyone While running on chaos monkey on spinnaker getting below things:

chaos monkey installed on the spinnaker aws instance ubuntu@ip-172-31-27-137:/apps/chaosmonkey$ chaosmonkey config spinnaker invalid character '<' looking for beginning of value json unmarshal failed github.com/Netflix/chaosmonkey/spinnaker.fromJSON /home/ubuntu/go/src/github.com/Netflix/chaosmonkey/spinnaker/fromjson.go:99 github.com/Netflix/chaosmonkey/spinnaker.Spinnaker.Get /home/ubuntu/go/src/github.com/Netflix/chaosmonkey/spinnaker/config.go:51 github.com/Netflix/chaosmonkey/spinnaker.(*Spinnaker).Get :1 github.com/Netflix/chaosmonkey/command.DumpConfig /home/ubuntu/go/src/github.com/Netflix/chaosmonkey/command/dumpconfig.go:27 github.com/Netflix/chaosmonkey/command.Execute /home/ubuntu/go/src/github.com/Netflix/chaosmonkey/command/chaosmonkey.go:327 main.main /home/ubuntu/go/src/github.com/netflix/chaosmonkey/cmd/chaosmonkey/main.go:35 runtime.main /usr/local/go/src/runtime/proc.go:201