Startup script fails: "Could not find or load main class org.apache.vysper.spring.ServerMain"

[garysheppardjr]

In https://github.com/apache/mina-vysper/blob/685a690b3aa141f7ab9f275c8c29b0b043232dd4/README.md:

A ready-to-run setup is created by the build in
  dist/target/appassembler/
Under
  dist/target/appassembler/bin
you'll find start scripts for Unix/Mac and Windows.

When I run mvn install and then try to run the startup script, here's the result:

Error: Could not find or load main class org.apache.vysper.spring.ServerMain Caused by: java.lang.ClassNotFoundException: org.apache.vysper.spring.ServerMain

Indeed, I cannot find a class called org.apache.vysper.spring.ServerMain in the repository. There are several ServerMain classes but not one in package org.apache.vysper.spring.

Am I doing something wrong? Or is there an easy fix to get Vysper running?