I am new to programming in Google Apps Script. I wanted to create a script to manage Classroom in Google Sheets. The problem is that everything works fine in the test deployment, but nothing shows up in the normal deployment. I wanted to have a button for the script appear on the right side in the add-ons, which opens an empty CardService for a moment and then a sidebar with an HTML file.

Below is the JSON code:

{
  "timeZone": "Europe/Warsaw",
  "exceptionLogging": "STACKDRIVER",
  "runtimeVersion": "V8",
  "dependencies": {
    "enabledAdvancedServices": [
      {
        "userSymbol": "AdminDirectory",
        "serviceId": "admin",
        "version": "directory_v1"
      },
      {
        "userSymbol": "Classroom",
        "serviceId": "classroom",
        "version": "v1"
      }
    ]
  },
  "oauthScopes": [
  ],
  "addOns": {
    "common": {
      "name": "Zarządzanie Classroomem",
      "logoUrl": "://iili.io/dTYC3Dx.png",
      "useLocaleFromApp": true,
      "homepageTrigger": {
        "runFunction": "createCard",
        "enabled": true
      }
    },
    "sheets": {
      "homepageTrigger": {
        "runFunction": "createCard",
        "enabled": true
      }
    }
  },
  "urlFetchWhitelist": [
    "://iili.io/"
  ]
}

And .gs file:

function createCard() {
  let card = CardService.newCardBuilder().build();

  let htmlOutput = HtmlService.createHtmlOutputFromFile('Sidebar').setTitle('Zarządzanie Classroomem')
  SpreadsheetApp.getUi().showSidebar(htmlOutput);

  return card
}

I can’t understand why everything works in the test deployment, but not in the normal deployment. I don’t know if the problem lies in the link to the image and the whitelist because I filled it out incorrectly. Maybe the error is due to a poorly constructed manifest file, or perhaps it’s related to accepting OAuth credentials. I would like to be able to open the sidebar with a button on the right side, not through the menu at the top on the toolbar.

I intentionally removed the https and oauthScopes before the links because the post was detected as spam.