After i kill 4 abaddon champions, game give me rewards for completing the quest and then Fatal errors with lines like:
LowLevelFatalError [File:C:\UE4.18\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp] [Line: 1151]
Failed to find function FinalizeCompletion in BP_RewardScript_C /Game/Maps/Campaign/Map_Campaign.Map_Campaign:PersistentLevel.BP_CampaignController_C_0.BP_RewardScript_C_1