Formfield in modular page does not appaer

Hi,
I used this instruction:

https://learn.getgrav.org/forms/forms/how-to-forms-in-modular-pages

to set up a contact form on my modular webpage which uses the antimatter theme.
Unfortunatly the formfied doesn’t appear. The path of my contact directory is: /home/_kontakt
In that directory you can find the form.md and the modular.md.

This is my form.md

title: Kontakt
menu: Kontakt
cache_enable: false

and this is my modular.md:

content:
    item: '@self.modular'

form:
    action: home 
    name: kontaktformular
    classes: clearfix
    fields:
         -
         -
    buttons:
        - type: submit
          value: Nachricht versenden
          classes: btn btn-success btn-block

    process:
        - email:
            from: "from@email.de"
            to:
              - "{{ config.plugins.email.to }}"
              - "my@email.de"
            subject: "GWB Website Kontakt: {{ 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: Danke für Ihre Nachricht!
        - display: /kontakt/thankyou/formdata.md 

I can’t figure out where i did the mistake.
Hope someone can see where it is.

The structure must be

/home/
/home/modular.md
/home/_kontact/form.md

Is that what you have?

Thanks for your answer i figured it out. I had both files form.md and modular.md in the same Folder