I have enrolled an iOS device (iPhone 12, iOS 15.6) to MobiControl version  15.5.2.1003 but I have so far not managed to deploy a profile. The device has an enrollment type of "Device" ie is fully managed.

I have attempted to deploy a profile to set global proxy settings, and another to block an app. In each case I get the error:

    Profile "profile name" version 1 failed to install, because all of its payloads cannot be installed.

I cannot seem to retrieve more specific error details than this. It feels like something is fundamentally broken but I have no idea what, and no idea how to disagnose the problem!