Go to Administration > Applications Panel and try to drag & drop one application icon. It does not work.
This issue comes from the fact that the jquery-ui-touch-punch library is loaded through an URL generated by the webjar module:
http://localhost:8080/xwiki/bin/webjars/resources/path?value=jquery-ui-touch-punch%2F0.2.3-2%2Fjquery.ui.touch-punch.min.js and this URL returns a 404 error.
This URL is generated by:
and we have "jquery-ui-touch-punch-0.2.3-2.jar" is the "lib" folder of the webapp.