Make sure that Enable MouseOver Events and Enable Mouse Click Events are set to True.
Add a Get Player Controller node and drag out the nodes Set Enable Mouse Over Events and Set Enable Mouse Click Events.
In order for the character to be click-able you’ll need to set the default Trace Channel to Pawn or Camera
Right click the **MyController **blueprint and click on Edit Defaults,
Locate the Mouse Interface tab and set Default Click Trace Channel to Pawn.
In UE4 I still have the same issue with some actors are triggered by Mouse Over, some of them are not. While all of the actors are children of the same master and all the settings are in the master with no changes to the child.