Invalid API Definition

Hello Team,

I am trying to evaluate SwaggerHub confluence plugin, whenever I import my my API, I am getting below "Invalid API Definition"

I have attached my swagger definition file, can you please let me know what I am doing wrong? 

openapi: 3.0.0
info:
  title: Beneficiary API
  description: "This is a simple Beneficiary API, where you can Create, Read, and\
    \ Delete beneficiary"
  contact:
    email: mjangid@somedomain.co.uk
  license:
    name: Apache 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
  version: 1.0.0
servers:
- url: https://mock.someserver.co.uk/
  description: Beneficiary API Auto Mocking
paths:
  /beneficiary:
    get:
      tags:
      - Beneficiary
      summary: Get all beneficiary
      description: |
        By selecting appropriate method, you can get all the available beneficiary for logged in user
      operationId: getBeneficiary
      responses:
        "200":
          description: List of all the beneficiary
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Beneficiary'
                x-content-type: application/json
        "400":
          description: bad input parameter
    post:
      tags:
      - Beneficiary
      summary: Create a beneficiary
      description: Create a beneficiary to the system
      operationId: createBeneficiary
      requestBody:
        description: Beneficiary to add
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Beneficiary'
      responses:
        "201":
          description: Beneficiary created
        "400":
          description: "invalid input, object invalid"
        "401":
          description: Unauthorised access
        "409":
          description: Beneficiary already exists
        "500":
          description: Server error
  /{beneficiaryId}:
    get:
      tags:
      - Beneficiary
      summary: Get beneficiary by Id
      description: get beneficiary by id
      operationId: getBeneficiaryById
      parameters:
      - name: beneficiaryId
        in: path
        description: beneficiaryId
        required: true
        style: simple
        explode: false
        schema:
          type: integer
      responses:
        "200":
          description: Beneficiary deleted
        "401":
          description: Unauthorised access
        "404":
          description: Beneficiary Not found
        "500":
          description: Server Error
    put:
      tags:
      - Beneficiary
      summary: Replace beneficiary
      description: |
        This operation is not supported yet
      operationId: putBeneficiary
      parameters:
      - name: beneficiaryId
        in: path
        description: beneficiaryId
        required: true
        style: simple
        explode: false
        schema:
          type: integer
      responses:
        "405":
          description: Method Not Allowed
    delete:
      tags:
      - Beneficiary
      summary: Delete beneficiary by Id
      description: Delete beneficiary by id
      operationId: deleteBeneficiaryById
      parameters:
      - name: beneficiaryId
        in: path
        description: beneficiaryId
        required: true
        style: simple
        explode: false
        schema:
          type: integer
      responses:
        "200":
          description: Beneficiary deleted
        "401":
          description: Unauthorised access
        "404":
          description: Beneficiary Not found
        "500":
          description: Server Error
    patch:
      tags:
      - Beneficiary
      summary: Modify beneficiary
      description: |
        This operation is not supported yet
      operationId: patchBeneficiary
      parameters:
      - name: beneficiaryId
        in: path
        description: beneficiaryId
        required: true
        style: simple
        explode: false
        schema:
          type: integer
      responses:
        "405":
          description: Method Not Allowed
components:
  schemas:
    Beneficiary:
      required:
      - beneficiary_address
      - beneficiary_id
      - beneficiary_name
      - beneficiary_scheme
      - beneficiary_scheme_id
      - party_id
      type: object
      properties:
        beneficiary_id:
          type: integer
          format: integer
          example: 123456789
        beneficiary_name:
          type: string
          example: Firstname Lastname
        beneficiary_scheme:
          type: string
          format: SortcodeAccountNumber
          example: SORTCODE_ACCOUNT
        beneficiary_scheme_id:
          type: string
          example: "8080812312312"
        beneficiary_address:
          type: object
          example:
            addressLine1: address Line 1
            addressLine2: address Line 2
            addressLine3: address Line 3
            city: City
            postcode: post code
        beneficiary_secondary_identifier:
          type: string
          format: uuid
          example: d290f1ee-6c54-4b01-90e6-d701748f0851
        beneficiary_avatar:
          type: object
          example: Image
        party_id:
          type: string
          example: customer_id
        metadata:
          type: object
          example:
            additional: information
        date_created:
          type: string
          format: date-time
      example:
        beneficiary_id: 123456789
        beneficiary_name: Firstname Lastname
        metadata:
          additional: information
        beneficiary_address:
          addressLine1: address Line 1
          addressLine2: address Line 2
          addressLine3: address Line 3
          city: City
          postcode: post code
        beneficiary_scheme_id: "8080812312312"
        beneficiary_avatar: Image
        date_created: 2000-01-23T04:56:07.000+00:00
        party_id: customer_id
        beneficiary_scheme: SORTCODE_ACCOUNT
        beneficiary_secondary_identifier: d290f1ee-6c54-4b01-90e6-d701748f0851

Namaste,

Manoj