When trying to deploy an Android profile to a device the error "-24" is displayed saying "Unknown error"
First seen in
Sophos Mobile Control 3.0
The reason for this error is, that the device to which the profile should be deployed is running an old version of the SMC client app.
What To Do
In order to solve this error and to be able to deploy profiles to the Android device, please update the client to the latest version available in the Google Play Store.
Once the client is updated it is possible to deploy profiles created with SMC to these devices.