I am following the instructions on the "How to Build" section of this site: https://github.com/blackberry/WebWorks-Samples/tree/master/UIExamples
to build the sample UI example project. I have followed it exactly, but on the last step I get this error message:
also in the Ripple simulator:
I needed an additional extention which is located here for people having the same issue:
https://github.com/blackberry/WebWorks-Community-APIs/tree/master/Smartphone/SpinnerControl
After installing that everything went fine.