I have 2018.2.10f1 amd Playmaker 1.9.0.p4. I have tried re-installing both, finishing with playmaker. On one reinstall I didnt have the problem. When I click on variables the console has a fit of errors peaking at the loop limit of 999. Otherwise, it just has only 15 or so. Such as :
NullReferenceException: Object reference not set to an instance of an object
HutongGames.PlayMakerEditor.VariableTypeMenuEditor.GetAllVariableTypesDefinitions () (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Editor/Classes/Actions.cs:105)
HutongGames.PlayMakerEditor.VariableTypeMenu.ParseVariableTypesDefinitions () (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Editor/Classes/Actions.cs:45)
And so on.....
GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
I have removed all code (C#) and removed all scenes and other work and restarted the PC and unity but still have the problem. I have worked on it solitary for a month now and desperately need help.