Azure AD "Grant permission" button stopped working

Question

Since 18th of May 2018 the button to grant permissions button in Azure (used as admin to give permission to application roles for all users) stopped working.

• I am global administrator on the AD
• It worked before

AAD error details: "Failed to grant permissions for application [application name]"

Error json:

{"errorCode":"Request_BadRequest","localizedErrorDetails":{"errorDetail":"Consent validation failed: "},"operationResults":null,"timeStampUtc":"2018-05-28T17:56:43.765787Z","clientRequestId":"1c1cad98-7731-45bf-8d78-8465ffdf902f","internalTransactionId":"42926dde-51de-451c-aae8-a186167197e8","upn":"[email protected]","tenantId":"f0000d-9eb0-473e-9646-ceggf5d47c69d","userObjectId":null}

I have no idea what has been changed since that day. Steps to reproduce:

• In App registrations under Azure active directory
• Modify the manifest and add a new application role to the API app
• Give permission to a client app for that application role
• Click "grant permission" in the upper right corner

Answer 1

In Azure Active Directory, Go to App Registrations, select the app where you want to add the rights to, go to Settings, Required Permissions and select the API which is giving you grief and delete it.

After that, add it again, and it should work now.