Game Failing on Build for Windows Error says facebook is missing files?

Questions & Answers
1

so the game runs fine in the editor but when i go to build i get the following errors:

   error CS0006: Metadata file `C:\Program Files\Unity\Editor\Data\PlaybackEngines\Facebook/Managed/UnityEngine.dll' could not be found
    
    Compilation failed: 1 error(s), 0 warnings

Error building Player because scripts had compiler errors

UnityEditor.BuildPlayerWindow+BuildMethodException: Build failed with errors.
  at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x001b9] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:162 
  at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00050] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:83 
UnityEditor.HostView:OnGUI()

Thing is im not building for facebook, im building for windows so im not sure where facebook comes into play?
either way im lost any help would be appreciated thanks

3

You can copy the “Managed” folder from “C:\Program Files\Unity\Editor\Data\PlaybackEngines\windowsstandalonesupport” to the “C:\Program Files\Unity\Editor\Data\PlaybackEngines\Facebook” folder and this should resolve your problem.

2

As a temporary solution, if you don’t need to build for the Facebook platform, you can just delete the following folder: “C:\Program Files\Unity\Editor\Data\PlaybackEngines\Facebook”.

4

Updating Unity to the latest version worked for me.