If target is not in step playbook is accepted and no warning is given

[MaartendeKruijf]

Describe the bug
If target is not in step playbook is accepted and no warning is given

To Reproduce provide details logs and steps
this is a problematic step (note the missing target):

"action--4e57c94a-aab6-4fd9-a84b-bb016c6109ba": {
      "type": "action",
      "id": "action--4e57c94a-aab6-4fd9-a84b-bb016c6109ba",
      "name": "Update case with severity of grid node",
      "on_completion": "end--f23fbb94-88ab-4476-88a4-c4cfb47aa07f",
      "commands": [
        {
          "type": "http-api",
          "command": "POST /thehive/api/v1/case/__soarca_case_id__:value/comment HTTP/1.1",
          "content": "{ \"message\":  \"medium or low grid impact severity\" }",
          "headers": {
            "Authorization": "Bearer f2eAPRxxq8Wej7OodikGkmyeottz0xGy"
          }
        }
      ],
      "agent": "soarca--3552da68-53d7-4e8c-8cc0-277d5ba2212a"
    }

Expected behavior
SOARCA should log an error

Screenshots
If applicable, add screenshots to help explain your problem.

Environment information
docker, all

Additional context
n.a.