Cannot open any assets

  1. Can you open assets in the UE4.12 Preview?
  2. Have you tried installing/reinstalling the Launcher itself?
  3. Are you running the program as an Administrator?
  4. Are you running any anti-virus that may be interfering with the proper installation of UE4.11 or the launcher?
  5. Is UE4 installed on the same drive as your “Unreal Projects” folder?