Symptoms
I am trying to create an Advanced SmartObject in the K2 Web Designer. I can create a method for the SmartObject, but when I try to add a second one, I cannot expand the Service Objects to select my second method. I cannot expand the Service Object to see methods and SmartObjects.
Diagnoses
This is a known issue with 4.6.11 which is looking to be fixed in 4.7.
Resolution
As a workaround, use K2 Studio to create Advanced SmartObjects instead. You can add multiple methods from different smartobjects here.