OH3 rule condition: Module is not well configured?

I’m using OH3 rules with this configuration:

triggers:
  - id: "1"
    configuration:
      cronExpression: 0 * * * * ? *
    type: timer.GenericCronTrigger
  - id: "3"
    configuration:
      itemName: openHABUtilitiesserver_ItemComfoair_Mode_High
    type: core.ItemStateChangeTrigger
conditions:
  - inputs: {}
    id: "4"
    configuration:
      itemName: Comfoair_Automatic
      state: ON
    type: core.ItemStateCondition
actions:
  - inputs: {}
    id: "2"
    configuration:
      type: application/javascript
      script: >-
        (...)
    type: script.ScriptAction

currently the cron triggers every minute, but with this error:

2021-01-23 12:43:00.595 [ERROR] [le.handler.ItemStateConditionHandler] - Module is not well configured: itemName=Comfoair_Automatic  operator=null  state = ON

The item Comfoair_Automatic is defined:

{
  "link": "http://openhabmain:8080/rest/items/Comfoair_Automatic",
  "state": "ON",
  "editable": true,
  "type": "Switch",
  "name": "Comfoair_Automatic",
  "label": "Comfoair Automatik",
  "category": "",
  "tags": [
    "Switch"
  ],
  "groupNames": [
    "ComfoAir"
  ]
}

Do I miss something?

I want to solve myself.

conditions:
  - inputs: {}
    id: "4"
    configuration:
      itemName: Comfoair_Automatic
      state: ON
      operator: =
    type: core.ItemStateCondition

I obviously forgot to set the “operator” in the conditions part… Perhaps this one should be another more “speaking” error-message in the log?
created a issue on github: