I didnt see his attachment there. Can confirm, I cannot import my own globals or the OPs into my project, using unity 2017.1 and playmaker verison 1.8.4.f5. Clean scene, 3d, only playmaker and a cube.
(With or without creating my own globals first, before importing).
I get the prompt "No globals to import" plus
The following error.
Failed to import package with error: Couldn't decompress package
UnityEditor.AssetDatabase:ImportPackage(String, Boolean)
HutongGames.PlayMakerEditor.GlobalsAsset:Import() (at c:/Users/Alex/Documents/Unity/Playmaker/Projects/Playmaker.source.unity/Assets/PlayMaker/Editor/Classes/ActionScripts.cs:125)
PlayMakerMainMenu:ImportGlobals() (at Assets/PlayMaker/Editor/PlayMakerMainMenu.cs:215)
Importing Globals...
UnityEngine.Debug:Log(Object)
HutongGames.PlayMakerEditor.GlobalsAsset:DoImport() (at c:/Users/Alex/Documents/Unity/Playmaker/Projects/Playmaker.source.unity/Assets/PlayMaker/Editor/Classes/ActionScripts.cs:139)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()