WebApps crash when adding a homescreen shortcut from a new web app

logcat.log

04-05 23:09:54.812 E/AndroidRuntime(29207): FATAL EXCEPTION: main
04-05 23:09:54.812 E/AndroidRuntime(29207): Process: com.tobykurien.webapps, PID: 29207
04-05 23:09:54.812 E/AndroidRuntime(29207): java.lang.NullPointerException: uriString
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.net.Uri$StringUri.<init>(Uri.java:470)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.net.Uri$StringUri.<init>(Uri.java:460)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.net.Uri.parse(Uri.java:432)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at com.tobykurien.webapps.activity.WebAppActivity.addShortcut(WebAppActivity.xtend:368)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at com.tobykurien.webapps.activity.WebAppActivity.onOptionsItemSelected(WebAppActivity.xtend:155)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.app.Activity.onMenuItemSelected(Activity.java:2895)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:404)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:185)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:100)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.app.AppCompatDelegateImplV7.onMenuItemSelected(AppCompatDelegateImplV7.java:655)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:811)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:958)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:948)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.support.v7.view.menu.MenuPopupHelper.onItemClick(MenuPopupHelper.java:191)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.widget.AdapterView.performItemClick(AdapterView.java:305)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.widget.AbsListView.performItemClick(AbsListView.java:1146)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:3053)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.widget.AbsListView$3.run(AbsListView.java:3860)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.os.Handler.handleCallback(Handler.java:739)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.os.Handler.dispatchMessage(Handler.java:95)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.os.Looper.loop(Looper.java:135)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at android.app.ActivityThread.main(ActivityThread.java:5343)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at java.lang.reflect.Method.invoke(Native Method)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at java.lang.reflect.Method.invoke(Method.java:372)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
04-05 23:09:54.812 E/AndroidRuntime(29207):     at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:117)