LoggerUtil problem in Classifier Documentation

http://moro.wolfe.ml:9000/template/wolfe/wolfe-docs/examples/01_classifier

Error on line 0, col 0: bad symbolic reference. A signature in LoggerUtil.class refers to term typesafe in package com which is not available. It may be completely missing from the current classpath, or the version on the classpath might be incompatible with the version used when compiling LoggerUtil.class.
