I am currently running Tomcat 7.0.39 as well the Xwiki 5.0.3 WAR. I imported the Xwiki database into MySQL from an older version of Xwiki which could be the cause of the problems below... When I enter "Administer Xwiki" and choose "Groups" I am sent to the following which lists the groups as expected. /xwiki/bin/admin/XWiki/XWikiPreferences?editor=globaladmin§ion=Groups#|t=groupstable&p=1&l=10&wiki=local When I click on the "pencil icon" to add a user to a group the same page URL is refreshed and shows a lot of white space followed by a list of users in that group at the bottom of the page. There is no option to add the user to a group. So somewhere along the line I believe something became corrupt during my Xwiki update. I tried copying some VMs from the templates subdir back to my main webapp directory but that didn't work. Any suggestions on where to look? Screenshot attached. <http://xwiki.475771.n2.nabble.com/file/n7585667/part2.png> -- View this message in context: http://xwiki.475771.n2.nabble.com/Unable-to-add-user-to-group-after-Xwiki-up... Sent from the XWiki- Dev mailing list archive at Nabble.com.