Spinakker : Not able to download http artifacts required for helm charts stage

Spinakker : Not able to download http artifacts required for helm charts stage

hal config:

http:
  enabled: true
  accounts: []

http/file:

http/file
my-app-0.1.0.tgz
https://repo.com/my-app/test/my-app-0.1.0.tgz

Logs:

Cloud driver logs: 2018-12-19 23:23:38.916 ERROR 1 --- [0.0-7002-exec-6] c.n.s.k.w.e.GenericExceptionHandlers : Internal Server Error

java.lang.IllegalArgumentException: An artifact account must be supplied to download this artifact: at com.netflix.spinnaker.clouddriver.artifacts.ArtifactDownloader.download(ArtifactDownloader.java:49) ~[clouddriver-artifacts-2.67.0-SNAPSHOT.jar:2.67.0-SNAPSHOT] at com.netflix.spinnaker.clouddriver.controllers.ArtifactController.lambda$fetch$0(ArtifactController.java:67) ~[clouddriver-web-2.67.0-SNAPSHOT.jar:2.67.0-SNAPSHOT] at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:106) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:93) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE] at org.springframework.web.context.request.async.WebAsyncManager$5.run(WebAsyncManager.java:327) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_171] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_171] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_171]