hi ue4 crashes on launch but i don’t know what file cause it. How can i find?

Hi Jeepee97, There are number of errors with blueprints in your log just before the critical error that need to be addressed: 4.15/Blacksmith 4.15/Content/Blueprints/Actor/Items/Weapons/BP_Weapons_2017-03-20-19-59-18.uasset) [2017.03.31-22.24.21:784][ 0]LogLinker:Warning: CreateExport: Failed to …