Form in modular page not sending EMAIL after SUBMISSION

after the submission in the contact form, the email doesn't send. The yaml goes like this:

menu: Home
content:
order:
dir: asc
by: default
custom:

• _features
• _about

• _contact-us
  items: '@self.modular'
  onpage_menu: true
  form:
  action: /thankyou
  fields:

  YAMLCopy

      name: name
      label: Name
      placeholder: 'Name*' 
      autocomplete: 'on'
      type: text
      validate:
          required: true
  -
      name: email
      label: Email
      placeholder: 'Email*'
      autocomplete: 'on'
      type: email
      validate:
          required: true
  -
      name: subject
      label: Subject
      placeholder: 'Subject*'
      autocomplete: 'on'
      type: text
      validate:
          required: true
  -
      name: phone
      label: Phone
      placeholder: 'Phone (Optional)'
      autocomplete: 'on'
      type: text
      validate:
          required: false
  -
      name: message
      label: Message
      placeholder: 'Message*'
      type: textarea
      validate:
          required: true
  -
      name: option
      label: 'Preffered Call time'
      type: checkboxes
      options:
          morning: Morning
          afternoon: Afternoon
          evening: Evening
      validate:
          required: false
  -
      name: g-recaptcha-response
      label: Captcha
      type: captcha
      recatpcha_site_key: 6LdRAxUTAAAAAM5lBUqF-hAjEd4j7CtxFa4N4Fo4
      recaptcha_not_validated: 'Captcha not valid!'
      validate:
          required: true
  

  buttons:

  YAMLCopy

      type: submit
      value: Submit
  -
      type: reset
      value: Reset
  

  process:

  TWIGCopy

      captcha:
          recatpcha_secret: 6LdRAxUTAAAAAFvS-8FDVBdV7p6o60QSyGwLfu-z
  -
      email:
          from: '{{ config.plugins.email.from }}'
          to: ['{{ config.plugins.email.to }}', '{{ form.value.email }}']
          subject: 'Contact Form Submission from {{ form.value.name|e }}'
          body: '{% include ''forms/data.html.twig'' %}'
  -
      display: /thankyou
  

I am using (modular.htm.twig) for the homepage.
Anyone? Can help me :(

You mentioned modular form, does a normal form page work, or is this problem specific to the modular form?

Did you configure the email plugin? Does it work with SMTP? Try with this debugging hint