Got "Unknown plugin name: aws:createImage" while creating SSM Document

I would like to create an SSM document for scheduling weekly backup AMI images, I have tried to copy the content from the built-in AWS-CreateImage document and made a few quick modifications to meet my requirements, but I couldn't pass the examination and keep getting this error message:

InvalidDocumentContent: Unknown plugin name: aws:createImage

Here is the content of my customized document:

{
  "description": "Creates an AMI image from an EC2 instance",
  "schemaVersion": "2.2",
  "assumeRole": "{{ AutomationAssumeRole }}",
  "parameters": {
    "InstanceId": {
      "type": "String",
      "description": "(Required) The ID of the Amazon EC2 instance."
    },
    "NoReboot": {
      "type": "Boolean",
      "description": "(Optional) Do not reboot the instance before creating the image.",
      "default": true
    },
    "AutomationAssumeRole": {
      "type": "String",
      "description": "(Optional) The ARN of the role that allows Automation to perform the actions on your behalf. ",
      "default": ""
    }
  },
  "mainSteps": [
    {
      "name": "createImage",
      "action": "aws:createImage",
      "onFailure": "Abort",
      "inputs": {
        "InstanceId": "{{ InstanceId }}",
        "ImageName": "VoIP-Weekly-Backup-AMI-{{ 'now' | date('YYYYMMdd-HHmmss') }}",
        "NoReboot": "{{ NoReboot }}"
      }
    }
  ],
  "outputs": [
    "createImage.ImageId"
  ]
}

I have checked the official documents about actions, and it looks like aws:createImage indeed exists, so I wonder what is wrong with my settings or syntax? What am I missing? What can I do to fix this issue? I would really appreciate any help.

Based on the comments.

The solution was to use Schema version 0.3 instead of newer 2.2. It seems that new schema does not support all actions.