I need to monitor some variables on my characters and found there is a nice debugger in UE4 called Gameplay Debugger. However, I tried the example class of UGDTComponent but failed to get it compiled. Apparently there is something wrong in the code. There is an unary constructor and a function named GetLifetimeReplicatedProps in the cpp but no declaration in the header file. Can anyone fix the example or give me another one that I can learn how to use Gameplay Debugger?