Which version of makehuman are you using? (version + date of the nightly build)
Even if you don’t get direct makehuman-to-unreal export to work, you should be able to upload your character to mixamo’s autorigger that is temporarily available for free along with large animation collection. Upload the character and see if their autorigger works for you, then select animation you want from the store, download as “fbx for unreal 4”.
I believe you’re restricted to 10 autorigged non-fuse characters though at the moment and there’s no way to get more, but I might be wrong about that.
Using autorigger will wipe existing skinweights but can also rig clothes for the characters. The result might still need manual tweaking later.