Hi, I am using Unity 4.6.0, Playmaker 1.8.3.f4. I am new Unity and Playmaker. When I tried to add the Action 'Set Animator Bool', the action browser becomes blank. I get an error Invalid cast exception. When I return from Game mode, the action browser returns to normal but whenever I try clicking Set Animator Bool, the same problem occurs and I can't use that particular action. Please help!