Unity 5.6.1f1 JSON Parse Error!

Hi, my project is not related to Facebook. But i’m not using it and i got this error every time. What can i do?
Also, when i try to search for the “empty document” i can’t even find it.
If you don’t wanna open the image or can’t see it properly, here is the error:

“ArgumentException: JSON parse error: The document is empty.
UnityEngine.JsonUtility.FromJson[AvailableSDKVersions] (System.String json) (at C:/buildslave/unity/build/artifacts/generated/common/modules/JSONSerialize/JsonUtilityBindings.gen.cs:25)
UnityEditor.Facebook.SDKManager.ParseSupportedSDKList (System.String data) (at C:/buildslave/unity/build/PlatformDependent/Facebook/Extensions/Managed/SDKManager.cs:180)”

Goto ‘C drive’… Find ‘ProgramData’ folder… goto ‘Unity’ folder… Find ‘Facebook’ folder and rename it to something else like → “FacebookOld”… Restart Unity… I hope the problem will be solved…