This App Cannot Be Found error when sideloading custom app on Teams

Question

Hello,

I'm currently developing a custom Teams App.

In my Teams Admin center I have enabled "custom apps"

In the teams developer portal, I have also validated the app manifest.

In my teams web app, I upload the application to my orgs catalog

The problem is that it never shows up in my built for my org.

I'm an admin and I can see the app on my teams app store. For some reason it's always initially blocked, but simply refreshing the page clears it up and it's unblocked (or i do block it from the actions button then unblock it)

if i try to upload it again from my Teams web or mac app, it says "This app cannot be found)

If I upload as a custom app, it does go through, but not really because the webhooks never get triggered when a message is sent and the bot can't be @ mentioned.

When i try to remove the custom-app uploaded version, I can see bot of my apps in the list of app. Again trying from here to add the 'upload to org catalog' version to a team, returns "Something went wrong" error.

The problem is I've also followed the demo app to create a sample notification app. It previously worked, but now it also doesn't work anymore, and exhibits all the behaviours described about.

Manifest file here:

manifest.txt

Answer 1

Your manifest is missing critical values:

• "id" is empty → this should be a valid GUID.
• "botid" is also empty → this must be the Azure AD App ID of your bot (usually the same as the App Registration's client ID).

These are required fields — without them, Teams cannot associate your app with a valid bot or identify it in the catalog.

Validate these and confirm whether it is working or not.

Answer 2

Hello Abiodun, Can you please provide your feedback whether this is working for you or not.
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