I am novice in the MS teams and bot development. I have created the project from the basic bot template and added the configure properties as guided here.

{
    "$schema": "https://developer.microsoft.com/en-us/json-schemas/teams/v1.16/MicrosoftTeams.schema.json",
    "manifestVersion": "1.16",
    "version": "1.0.0",
    "id": "${{TEAMS_APP_ID}}",
    "developer": {
        "name": "Teams App, Inc.",
        "websiteUrl": "https://www.example.com",
        "privacyUrl": "https://www.example.com/privacy",
        "termsOfUseUrl": "https://www.example.com/termofuse"
    },
    "icons": {
        "color": "color.png",
        "outline": "outline.png"
    },
    "name": {
        "short": "MyProject${{APP_NAME_SUFFIX}}",
        "full": "full name for MyProject"
    },
    "description": {
        "short": "short description for MyProject",
        "full": "full description for MyProject"
    },
    "accentColor": "#FFFFFF",
    "bots": [
        {
            "botId": "${{BOT_ID}}",
            "scopes": [
                "team",
                "groupchat"
            ],
            "supportsFiles": false,
            "isNotificationOnly": false,
            "configuration": {
                "groupChat": {
                    "fetchTask": true
                },
                "team": {
                    "fetchTask": true
                }
            },
        }
    ],
    "composeExtensions": [],
    "configurableTabs": [],
    "staticTabs": [],
    "permissions": [
        "identity",
        "messageTeamMembers"
    ],
    "validDomains": []
}

When I try to run the project from the teams toolkit, it fails at teamsApp/validateManifest step

Summary:
1 failed.
You can check and update your Teams manifest at ./appPackage/manifest.json.
(×) Error: /bots/0 must NOT have additional properties

And this is because of configuration key. When I checked the JSON schema, there is no such key available in the object of bots array, but the schema in the documentation mentions otherwise.