Unable to upload a custom app in teams

Question

I am unable to upload a custom app in teams via teams admin portal. I am getting the following error:

Mgmt.AppCatalog.LOBApp.Upload.BadRequest.UnknownTeamsAppManifestExceptionType

Refer the following screenshot:

Following is the error that I see in the developer console:

{"error":{"code":"BadRequest","message":"Failed to execute AMS backend request CreateDocumentRequest. Workload Unknown. Request Url: https://in-api.asm.skype.com/v1/objects, Request Method: POST, Response Status Code: BadRequest, Response Headers: Strict-Transport-Security: max-age=31536000; includeSubDomains\r\nServer: Microsoft-IIS/10.0\r\nDate: Mon, 11 Apr 2022 08:04:23 GMT\r\n, Reason Phrase: Bad Request","innerError":{"message":"Failed to execute AMS backend request CreateDocumentRequest. Workload Unknown. Request Url: https://in-api.asm.skype.com/v1/objects, Request Method: POST, Response Status Code: BadRequest, Response Headers: Strict-Transport-Security: max-age=31536000; includeSubDomains\r\nServer: Microsoft-IIS/10.0\r\nDate: Mon, 11 Apr 2022 08:04:23 GMT\r\n, Reason Phrase: Bad Request","code":"UnknownTeamsAppManifestExceptionType","innerError":{},"date":"2022-04-11T08:04:24","request-id":"a6acb230-a61a-42d0-8b61-78c705692499","client-request-id":"a6acb230-a61a-42d0-8b61-78c705692499"}}}

I have been able to reproduce this issue on multiple tenant. Moreover the issue seems to be intermittent as the manifest gets uploaded successfully sometime.

Is something changed on the microsoft server that is causing this issue? If not, is there something that I need to change in the manifest to make it work.

Answer 1

We are able to repro this issue. We have raised a bug for it. We will inform you once we have any update.

Update:
The issue seems to be resolved now. Please check and confirm.

Thanks,

Prasad Das

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Answer 2

We're facing the exact same problem. I've also found several others have reported the same problem in another thread here (https://techcommunity.microsoft.com/t5/teams-developer/mgmt-appcatalog-lobapp-upload-badrequest/m-p/3281115). This was raised yesterday (2022-04-10).
I've found that an old manifest file generated by the Teams SDK for VS Code, does upload without issues.