Error 500 on windows

Hi there!

I was following this tutorial on installing xwiki on my machine. Everything went good but i have the next error on first launch:

java.lang.NullPointerException
com.xpn.xwiki.web.Utils.getContextComponentManager(Utils.java:690)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:747)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:776)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:729)
org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:55)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)