I'm trying to use plugins that work on top of the Form plugin. But none works because the actions described in the Process section are not performed.
Can not have any settings or modules?
I have been fighting this problem for a week already.

Hopefully looking at how the Add Page by Form plugin handles the process action helps you.

Excuse me, I did not quite understand what you meant ...
In https://github.com/getgrav/grav-plugin-comments/blob/develop/comments.yaml
--- yaml
buttons:

• type: submit
  value: PLUGIN_COMMENTS.SUBMIT_COMMENT_BUTTON_TEXT
  ​
  process:

  - captcha:

  recaptcha_secret: ej32oiej23oiej32oijeoi32jeio32je

• email:
  subject: PLUGIN_COMMENTS.EMAIL_NEW_COMMENT_SUBJECT
  body: "{% include 'forms/data.html.twig' %}"
• addComment:
• message: PLUGIN_COMMENTS.THANK_YOU_MESSAGE

• reset: true

  YAMLCopy

  In https://github.com/getgrav/grav-plugin-login/blob/develop/pages/register.md
  --- yaml
  buttons:
    -
        type: submit
        value: Submit
    - 
        type: reset
        value: Reset
  
  process:
    register_user: true
    message: "You are logged in"
  

  If I add "task: smth" to the button, then I can handle this task. But the documentation says that I can use Process, but it does not work.
  The page is simply Reload