"Something went wrong" on adding a published MS Teams application

Developer 

Hi, 

I'm trying to add a published MS Teams bot application (I created this app on MS Developer Portal)

After clicking "Add" I get:

Do you know what might cause it?

I might add that I'm inside an organization with very strict security and I've already stumbled upon a confusing error described in this thread which was caused by me not having Azure AD permission to create applications

Here's my app's manifest (I've hidden IDs):

{
    "$schema": "https://developer.microsoft.com/en-us/json-schemas/teams/v1.15/MicrosoftTeams.schema.json",
    "version": "1.0.2",
    "manifestVersion": "1.15",
    "id": "<HIDDEN>",
    "packageName": "com.package.name",
    "name": {
        "short": "[Chatbot] IBM Watson",
        "full": ""
    },
    "developer": {
        "name": "ChatbotTeam",
        "mpnId": "",
        "websiteUrl": "https://www.google.com",
        "privacyUrl": "https://www.google.com",
        "termsOfUseUrl": "https://www.google.com"
    },
    "description": {
        "short": "blablabla",
        "full": "version 1.0.3."
    },
    "icons": {
        "outline": "outline.png",
        "color": "color.png"
    },
    "accentColor": "#FFFFFF",
    "staticTabs": [
        {
            "entityId": "conversations",
            "scopes": [
                "personal"
            ]
        },
        {
            "entityId": "about",
            "scopes": [
                "personal"
            ]
        }
    ],
    "bots": [
        {
            "botId": "<HIDDEN>",
            "scopes": [
                "personal",
                "team",
                "groupChat"
            ],
            "isNotificationOnly": false,
            "supportsCalling": false,
            "supportsVideo": false,
            "supportsFiles": false
        }
    ],
    "validDomains": [],
    "webApplicationInfo": {
        "id": "<HIDDEN>,
        "resource": ""
    }
}