NullPointerException after upgrade from 6.0.1 to 6.1 (Debian package)

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

java.lang.NullPointerException
	com.xpn.xwiki.web.Utils.getContextComponentManager(Utils.java:686)
	com.xpn.xwiki.web.Utils.getComponent(Utils.java:741)
	com.xpn.xwiki.web.Utils.getComponent(Utils.java:708)
	com.xpn.xwiki.web.XWikiRequestProcessor.processPath(XWikiRequestProcessor.java:47)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:154)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:115)
	org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:126)
	com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.28 logs.