Plugin is an unexpected type: object

[kisonay]

Trying to follow the directions and receive the following error when modifying the plugin array:

"plugins": [
      "onesignal-expo-plugin",
      {
        "mode": "development",
      }
    ]

Error:

Plugin is an unexpected type: object

If I remove the object, then I receive the following error:

Missing required "mode" key in your app.json or app.config.js file for "onesignal-expo-plugin".

Package dependencies:

"dependencies": {
    "expo": "~44.0.0",
    "expo-status-bar": "~1.2.0",
    "onesignal-expo-plugin": "^1.0.0-beta10",
    "react": "17.0.1",
    "react-dom": "17.0.1",
    "react-native": "0.64.3",
    "react-native-web": "0.17.1",
    "expo-splash-screen": "~0.14.1"
  },

[rgomezp]

Howdy,
You're missing an extra set of brackets. Check the README again for reference.

Enjoy!

[kisonay]

Doh, now I feel foolish. Cant tell you how many times I compared it to the docs...

[m5atib]

This message often appears when there is an error in the app.json file

[DeliveranceTechSolutions]

I second @m5atib my problem was the app.json with something random in it.

[nazirahmad7340]

"plugins": [
    [
          "onesignal-expo-plugin",
          {
            "mode": "development",
          }
    ]
 ]

you have a missing []
This is the correct syntax

[devnshankar]

"plugins": [[
    "expo-router",
    "expo-image-picker",
    {
      "photosPermission": "The app accesses your photos to let you share them with your friends."
    }]]

The error when double square brackets are imlpimented as guided in the docs

AssertionError [ERR_ASSERTION]: Wrong number of arguments provided for static config plugin, expected either 1 or 2, got 3

I've been scratching my head since 5 minutes still no solution.

[SaeedSoheili]

"plugins": [[
    "expo-router",
    "expo-image-picker",
    {
      "photosPermission": "The app accesses your photos to let you share them with your friends."
    }]]

The error when double square brackets are imlpimented as guided in the docs

AssertionError [ERR_ASSERTION]: Wrong number of arguments provided for static config plugin, expected either 1 or 2, got 3

I've been scratching my head since 5 minutes still no solution.

i think correct solution is like:

    "plugins": [
      "@react-native-google-signin/google-signin",
      [
        "expo-build-properties",
        {
          "android": {
            "usesCleartextTraffic": true
          }
        }
      ]
    ],

[princechibez]

"plugins": [ "expo-router", "expo-font", { "fonts": [ "./assets/fonts/Rubik-Regular.ttf" ] } ],

I tried adding expo font to the plugin and it keeps returning an error
PluginError: Plugin is an unexpected type: object

[hasanzu514]

"plugins": [ "expo-router", "expo-font", { "fonts": [ "./assets/fonts/Rubik-Regular.ttf" ] } ],

I tried adding expo font to the plugin and it keeps returning an error PluginError: Plugin is an unexpected type: object

I had the same error but looking at the above replies I did the following (wrapped all the expo font part in brakcets):
"plugins": [ "expo-router", ["expo-font", { "fonts": [ "./assets/fonts/Rubik-Regular.ttf" ] } ]]