JAVA code-gen not creating model java files

I am trying to expose an internal API for customers to use. For this; I am generating the Swagger api-docs from the API response, and generating the YAML file with it.

Then to the YAML file I am using 'openapi-generator-maven-plugin' to create the model files that will point to internal code for the external users to view the response.

spring-boot: 2.3.2.RELEASE
Java: 1.8
okhttp: 4.8.1
gson: 2.8.6
openapitools: 4.3.1
code-findbugs: 3.0.2

I have in response:

{
  "offset": 0,
  "limit": 200,
  "total": 136,
  "status": {
    "code": 200,
    "message": "Success"
  },
  "count": 136,
  "reponseLastModified": "2020-09-02T20:56:57.951+0000",
  "adjustments": [
    {
      "name1": "value1",
      "name2": value2,
      "name3": value3,
      "name4": "value4"
    },
   {
      "name1": "value1",
      "name2": value2,
      "name3": value3,
      "name4": "value4"
    }
  ]
}

For the above, I generated the Swagger JSON and converted to YAML code(removing some parts):

responses:
          200:
            description: OK
            content:
              application/json:
                schema:
                  $ref: '#/components/schemas/AdjustmentResponse'
     AdjustmentResponse:
      type: object
      properties:
        offset:
          type: integer
          description: 'The number of items to offset the start of the list from.'
          format: int32
          example: 5
        limit:
          type: integer
          description: 'The number of items you want the list to be limited to.'
          format: int32
          example: 10
        total:
          type: integer
          description: 'The total number of items that are in the entire collection.'
          format: int32
          example: 50
        count:
          type: integer
          format: int32
        reponseLastModified:
          type: string
        adjustments:
          type: array
          items:
            $ref: '#/components/schemas/Adjustment'
    Adjustment:
      type: object
      properties:
        name1:
          type: string
          description: 'ABCD'
        name2:
          type: integer
          description: 'ABCD'
          example: 39
        name3:
          type: string
          description: 'ABCD'
        name4:
          type: integer
          description: 'ABCD'
          example: 39

When I generate the Models, it will generate the models but will not generate the response API from what I generated the Swagger.

Changing the YAML file to below will generate the response but then the model file 'Adjustment' does not get generated since in AdjustmentResponse DTO it shows up as: List adjustments.

....
adjustments:
          items:
            $ref: '#/components/schemas/Adjustment'
    Adjustment:
      type: array
.....

Start by validating the YAML schema around AdjustmentResponse and Adjustment, then inspect the generated Java models and response API output from openapi-generator-maven-plugin 4.3.1. Confirm whether the array property is represented consistently; done means the response API and both AdjustmentResponse and Adjustment model files are generated.