I know this post is old and likely already resolved. However, I had the same issue. I couldn't find anything about this missing class. I found one class related to wcps that wasn't applied to the server: wcps-services-web-lib#18.104.22.168.0. Once I applied this to the server I was deploying to, it revealed an issue with an improperly unpacked *.ear file. So your issue maybe two fold, as mine was. Hopefully, this helps you or someone else looking into this same issue.