They dont?
0]LogBlueprint:Error: [compiler QTPlayerHUD] Error No input structure to break for QTItem Base Struct
0]LogBlueprint:Error: [compiler QTController] Error No input structure to break for QTItem Base Struct
0]LogBlueprint:Error: [compiler QTController] Error This blueprint (self) is not a QTStatusEffects_C, therefore ’ Target ’ must have a connection.
0]LogBlueprint:Error: [compiler QTController] Error COMPILER ERROR: failed building connection with ‘Actor Class is not compatible with PLACEHOLDER-CLASS QTStatus Effects C 46 Class.’ at ItemIsHealth
0]LogBlueprint:Error: [compiler QTInventoryEquipment] Error The current value (/Game/FirstPersonBP/Blueprints/Inventory/Items/Credits/QTItemCredits.QTItemCredits_C) of the ’ Drop Item ’ pin is invalid: /Game/FirstPersonBP/Blueprints/Inventory/Items/Credits/QTItemCredits.QTItemCredits_C isn’t a valid subclass of QTItemBase_C (specified on pin DropItem)
Some Errors from your log.
Maybe you forgot about them ^^
Edit: But you should not have any trouble fixing it then 