There is a red forbidden sign on macro app. Please help!

[Uche]

There is a red forbidden sign when I insert my macro app on a page. i am not allowed to access my app developed.

Here is my current manifest
type or paste code here

permissions:
  scopes:
    - "read:confluence-props"
    - "write:confluence-props"
    - "read:jira-user"
    - "read:page:confluence"
    - "write:page:confluence"

modules:
  macro:
    - key: simple-signup
      function: main
      title: Simple Sign-up
      description:
        Need people to sign up for something? Use this instead of an Editor
        table!
      config:
        function: config
  function:
    - key: main
      handler: index.run
    - key: config
      handler: config.run
app:
  id: ari:cloud:ecosystem::app/9f73f426-e8cb-4891-9344-5b22fdbd9fc2
  runtime:
    name: sandbox

[AaronCollier]

Macros aren’t editable directly when editing the page. The contents are inaccessible. You should be able to click the button on a published page. If you need to edit what is seen, use macro configuration.