got the same issue on 5.3.2 and 5.4.2 with the City Crowd Sample. Get this line 160 times, but each for a diferent groom. LoadErrors: Warning: CreateExport: Failed to load Outer for resource ‘MI_Facial_Hair_DynInst’: GroomComponent /Game/CitySampleCrowd/Maps/CitySampleCrowd_LVL.CitySampleCrowd_LVL:PersistentLevel.BP_CrowdCharacter_C_0.Beard. Because the sample is for 5.3.2 I installed that version because I had it running on 5.3.2 earlier, strangely getting the same warnings and blueprint issues as on 5.4.2.
Tried most of the fixes above but no solution. Any tips?