Forum Discussion
App Validation failing for no clear reason
We're trying to get our (very simple) Teams App listed on the app store, but during the App Validation we keep getting the same error: "Unable to upload the manifest.zip file in MS Teams." as seen be...
Add the required top level packageName property, for example "packageName": "com.contoso.myapp". The manifest shown omits it, which can cause the generic upload failure even when other checks pass. Also verify that manifest.json, color.png, and outline.png are directly at the ZIP root, and save manifest.json as UTF-8 without BOM.