I am using MDG release 748 and created a custom data model and a custom ui (copied usmd_entity_value2) and followed necessary steps for bus.activity, change request..etc.
Did not get any errors while activating data model or ui. However, I get 500 internal server error when opening my custom application from the nwbc menu. It looks like the custom ui is somehow not linked to the data model. But I did enter the data model in ui configuration.
What are the debugging steps I can perform to find the issue?