[Bug Report]: Error when deployment `app/managed-environment` without providing role assignments in `parameter.json`

[Marc013]

Describe the bug

Using module 'modules/app/managed-environment' throws exception 'Object reference not set to an instance of an object.' when NOT providing parameter roleAssignments.

To reproduce

Create parameters file without parameter roleAssignments and run the deployment.

Code snippet

No response

Relevant log output

No response