Getting BadRequest on UploadDocumentContentRequest when trying to update custom app

This is still happens

The mainfest:

{
  "$schema": "https://developer.microsoft.com/en-us/json-schemas/teams/v1.16/MicrosoftTeams.schema.json",
  "version": "1.0.3",
  "manifestVersion": "1.16",
  "id": ...,
  "packageName": "com.package.name",
  "name": {
    "short": ...,
    "full": ""
  },
  "developer": {
    "name": ...,
    "mpnId": "",
    "websiteUrl": ...,
    "privacyUrl": ...,
    "termsOfUseUrl": ...
  },
  "description": {
    "short": ...,
    "full": ...
  },
  "icons": {
    "outline": "outline.png",
    "color": "color.png"
  },
  "accentColor": "#0084ff",
  "bots": [
    {
      "botId": ...,
      "scopes": [
        "team"
      ],
      "isNotificationOnly": false,
      "supportsCalling": false,
      "supportsVideo": false,
      "supportsFiles": false
    }
  ],
  "validDomains": [],
  "webApplicationInfo": {
    "id": ...,
    "resource": ""
  },
  "devicePermissions": [
    "notifications"
  ],
  "authorization": {
    "permissions": {
      "resourceSpecific": [
        {
          "name": "TeamsActivity.Send.Group",
          "type": "Application"
        }
      ]
    }
  }
}