How to locate disallowed texture data converted from Creative island template

General Issues and Bug Reporting
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Steps to reproduce the issue

  1. create one Creative island using the Equip Furniture Props template (saw that in the great steam: Creating in Fortnite - Templates - YouTube)
  2. go into UEFN, convert that island
  3. the island is opened in UEFN, but it can not be played showing error messages below
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Vehicles/FORT_Vehicles_01/TextureData/Hotrod_Red.Hotrod_Red
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Athena/Apollo/Environments/BuildingActors/Farm/Props/Apollo_Farm_Trailer_01.Apollo_Farm_Trailer_01_C
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Vehicles/FORT_Vehicles_01/TextureData/Car_RV_Blue.Car_RV_Blue
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Environments/Sets/Neo/Vehicles/Materials/Truck_Color3.Truck_Color3
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Vehicles/FORT_Vehicles_01/TextureData/Car_Pickup_Green.Car_Pickup_Green
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Vehicles/FORT_Vehicles_01/TextureData/Car_RV_Red.Car_RV_Red
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Environments/Apollo/Sets/Agency/TextureData/Agency_Reception_Desk_Neutral.Agency_Reception_Desk_Neutral
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Building/ActorBlueprints/Prop/IND_ForemanOffice_Chair.IND_ForemanOffice_Chair_C
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Environments/Sets/Neo/Vehicles/Materials/Truck_Color1.Truck_Color1
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Athena/Apollo/Environments/BuildingActors/Street/Props/Apollo_Street_SignKeepOut_01.Apollo_Street_SignKeepOut_01_C
LogValkyrieValidation: Error: [16] Found disallowed object type /Game/Vehicles/FORT_Vehicles_01/TextureData/Hotrod_Green.Hotrod_Green

I could find the mentioned actors in the map and deleted them.
But I wonder how to locate actors using those texture data (besides checking 4k actors one by one)?

Thank you