When using Custom Communication Scenarios, cannot click on the new button as shown below:
SAP S/4HANA CLOUD 1705 / 768
This is expected behavior.
This feature is part of the extensibility. If extensibility is not available in the system, then this feature will not be available.
Custom communication Scenario new, Fiori Custom communication scenario new button , KBA , BC-SRV-APS-COM , Maintain Communication System and Arrangement , Problem