...
The Admin and Lite interfaces that were available in Grouper UI versions up to 2.3.0 have been removed by default in Grouper 2.4.0. For installations that still need this functionality, the source code for these modules has been moved to a legacy directory, and a download patch is available which can be applied directly to a war directory to restore those pages. Note, in 2.4 you should have patch 2.4.0 ui patch #28
Installing
1) First, please archive your existing web application. While this process works at the point in time of the 2.4.0 release, future changes to the UI module may adversely affect this legacy code. It may also overwrite custom code for your institution.
...