Cant use Global Variable in DefaultTrackableventHandler.cs

So I've been making a global variable (with the public static variable) and i put it in one script, globVar.cs

But, after i update my Vuforia, i can't use it in DefaultTrackableEventHandler.cs . Could someone help me out? Before i update the Vuforia, it works perfectly just fine, but after updating it, it became like that and i got this error in console:

 

I have the same problem,
Could someone solve the problem?