Role assignment is Unknown

[arrerezai]

While running the Building-DeploymentPlans script, it runs through and processes all the policy assignment files.
When it gets to ALZ-Corp-Default, it adds a few roles at Corp MG level and one at the subscription level as per:

"additionalRoleAssignments": {
                        "*": [
                            {
                                "roleDefinitionId": "/providers/microsoft.authorization/roleDefinitions/4d97b98b-1d4f-4787-a291-c67834d212e7",
                                "scope": "/subscriptions/connectivity--subscription--id" // Replace with your connectivity subscription Id
                            }
                        ]
                    }

This is what I am experiencing:

What I do not like with this is that it says "add role Unknown" at the subscription level instead of "add role Network Contributor". I have tried to add (what I thought was the missing piece) according to below:

But it keeps coming up as "Unknown".
Now I know that this assignment block is only optional, but in case it is present, I am keen in understanding and fixing what doesn't fully work. Any thoughts?