Navigation Node Cannot Be Selected in the UWL Configuration Wizard 
You want to customize the look and feel of your UWL with the UWL Configuration Wizard using the manager self service (MSS). The Select the Navigation Node To Be Customized dropdown list is empty.
The MSS file uses the following navigation node name: <NavigationNode name="com.sap.pct.erp.mss.Main"...
The configuration wizard does not support this navigation node name format.
Open the XML configuration file with the name com.sap.pct.erp.mss.001.
Change the top navigation node to “Main” by replacing the whole expression “com.sap.pct.erp.mss.Main” with “Main”.
Go to the UWL iView properties and change the property useNavigationId to “Main”. Now the UWL uses the navigation configuration of the MSS file.