The compiler this script was imported with is not available anymore

I just import PlayFab lib on my project, but I can run it because every time I get this error:

The compiler this script was imported with is not available anymore.
UnityEditorInternal.InternalEditorUtility:GetMonoIslands()
System.Reflection.MethodBase:Invoke(Object, Object[])
SyntaxTree.VisualStudio.Unity.Bridge.CompilationUnit:CompilationUnits()
SyntaxTree.VisualStudio.Unity.Bridge.ProjectSystem.UnitySolutionBuilder:.ctor()
SyntaxTree.VisualStudio.Unity.Bridge.ProjectSystem.UnitySolutionBuilder:CreateSolutionFromAssetDatabase()
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFilesGenerator:GenerateProject()
SyntaxTree.VisualStudio.Unity.Bridge.<>c__DisplayClass3:<RunOnceOnUpdate>b__2()
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()


Has Anyone some advice to understand what happen? Any idea for troubleshooting it?

 

Finally I resolved the issue... I just remove the directory "UnityVS" and all works fine again...