Android Question [B4X] XUI Views - ClassNotFoundException: b4a.example.b4xseekbar

Hi,
Trying to run the XUI Views - Cross platform views and dialogs example - 'XUI Views Example.zip'
https://www.b4x.com/android/forum/threads/b4x-xui-views-cross-platform-views-and-dialogs.100836/

But when it runs and hits line 49

I get
java.lang.RuntimeException: java.lang.ClassNotFoundException: b4a.example.b4xseekbar

The XUI Views library is version 2.13

b4A is version 9.50

Any help is appreciated

Lee.