I attempted to export the SK_Mannequin.FBX from Unreal to Mixamo. Once in Mixamo, I gathered all of the animations I wanted for him and attempted to download them. The download screen did not offer the Unreal FBX, so I chose the generic FBX. Upon importing the files into Unreal I received several errors to include:
Warning: No smoothing group information was found in this FBX scene. Please make sure to enable the ‘export smoothing groups option’
There is no geometry information in mesh
I’ll attach some photos of what I’m doing.