I created a new perform harness, added screen layout and section with a button in which I configured Click Action = Finish Assignment. The click on the button does not result into any action. Do you have any recommendation what is missing here?
To shed more light on this issue. Typically Screen layouts doesn't come with HTML Form tag. Without that we won't be able to submit the form itself. That is the reason finish assignment action is not supported within Screen layout.
Ideally the portal harness is the one where you should be configuring screen layout. The center portion of the screen layout will be holding a dynamic container. This is responsible for displaying the work object in perform mode.