[xwiki-users] oddity after upgrade from 6.4.2 to 7.1.4

I have update the XWiki 6.4.2 to 7.1.4 with using "xwiki-enterprise-jetty-hsqldb-7.1.4.zip" on window server with success then i import 6.4.2 xar to 7.1.4 and import some ui,such as xwiki-platform-watchlist-ui.xar,o-rg.xwiki.platform-xwiki-platform-admin~.xar,o-rg.xwiki.platform-xwiki-platform-activ~.xar etc. when i do some thing in the XWiki/XWikiPreferences What causes the following error? error.error <http://xwiki.475771.n2.nabble.com/file/n7598342/error.error> -- View this message in context: http://xwiki.475771.n2.nabble.com/oddity-after-upgrade-from-6-4-2-to-7-1-4-… Sent from the XWiki- Users mailing list archive at Nabble.com.