[Bug]: Cannot convert undefined or null to object - when create Dry run

[goranbs]

Contact details

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Current behavior

Successfully created new project which contains successfully created workflow template. Upon create new dry run this error occurs, and no new dry run can be created.

Expected behavior

new dry run created.

Steps to reproduce

example workflow that leads to this strange error upon "create" workflow:

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
generateName: magma-
spec:
entrypoint: magma-workflow
volumes:
- name: data-volume
emptyDir: {}

templates:
- name: magma-workflow
dag:
tasks:
- name: extract-files
template: extract-files
- name: magma-c1
template: c1
depends: "extract-files"
arguments:
artifacts:
- name: file
from: "{{dag.tasks.c1.outputs.artifacts.output}}"

- name: extract-files
  inputs:
    artifacts:
    - name: input_file
      path: /tmp/file
      raw:
        data: provide input tar.gz file
  outputs:
    artifacts:
    - name: output
      path: /tmp/data
  container:
    image: bash
    command: [sh, -c]
    args: ["tar -xf {{inputs.artifacts.input_file}}}}"]
- name: c1
  outputs:
    artifacts:
    - name: output
      path: /tmp/output_file.csv
  container:
    image: magma
    command: [java, -jar]
    args: ["./app.jar -c1 /tmp/data"]

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