Hey Sezze,
Before rebuilding ue4. Do you delete any folders?
I always delete the folders:
- .idea
- .vs
- Binaries
- Intermediate
- Saved
I also delete the solution file (.sln)
I do this just to make sure it all gets regenerated.
Also.
I also suggest using Rider for unreal.
link text
I switched to it some time ago. And for ue4 it is a lot better than stand-alone VS.