W/System.err:

When i try to import this widget (https://github.com/pablorr18/TiFlexiGrid) to my project i receive the folloinf WARNING:

[WARN] :   W/System.err: java.lang.NullPointerException
[WARN] :   W/System.err:    at ti.modules.titanium.ui.ScrollViewProxy.getScrollingEnabled(ScrollViewProxy.java:84)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Object.nativeCallProperty(Native Method)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Object.callProperty(V8Object.java:69)
[WARN] :   W/System.err:    at org.appcelerator.kroll.KrollProxy.handleMessage(KrollProxy.java:1121)
[WARN] :   W/System.err:    at android.os.Handler.dispatchMessage(Handler.java:95)
[WARN] :   W/System.err:    at android.os.Looper.loop(Looper.java:137)
[WARN] :   W/System.err:    at org.appcelerator.kroll.KrollRuntime$KrollRuntimeThread.run(KrollRuntime.java:112)
[ERROR] :  V8Exception: Exception occurred at ti:/titanium.js:315: Uncaught Error: Java Exception occurred