Form not working after grav updating

title: Home
menu: Home
published: true
form:
    name: contact-form
    fields:
        - name: fname
          label: First name:
          size: col-xs-6
          placeholder: Enter your first name
          autocomplete: on
          type: text
          classes: form-control
          validate:
            required: true

        - name: lname 
          label: Last name:
          size: col-xs-6
          placeholder: Enter your last name
          autocomplete: on
          type: text
          classes: form-control
          validate:
            required: true

        - name: email
          label: Email:
          size: col-xs-12 col-sm-6
          placeholder: Enter your email address
          type: email
          classes: form-control
          validate:
            required: true

        - name: message
          label: Message:
          size: col-xs-12
          rows: 5
          placeholder: Enter your message here
          type: textarea
          classes: form-control
          validate:
            required: true

        - name: subscribe
          type: checkbox
          default: checked
          label: "Register with Empty Legs newsletter?"
          size: pull-left col-sm-6 col-xs-12 mb-2rem
          validate:
            required: false

    buttons:
        - type: submit
          value: Submit my message

    process:
        - email:
            from: "{{ config.plugins.email.from }}"
            to:
              - "{{ config.plugins.email.from }}"
              - "{{ form.value.email }}"
            subject: "[Feedback] {{ form.value.name|e }}"
            body: "{% include 'forms/data.html.twig' %}"
        - save:
            fileprefix: feedback-
            dateformat: Ymd-His-u
            extension: txt
            body: "{% include 'forms/data.txt.twig' %}"
        - message: Thank you for your feedback!
        - display: /components/thankyou