java.lang.IllegalStateException: [Winsys] TopComponent org.netbeans.core.multiview.MultiViewCloneableTopComponent throws runtime exception from its componentShowing() method.
Please repair it! Probable cause is at org.netbeans.modules.visualweb.designer.cssengine.CssEngineServiceImpl.getBackgroundImageUrlForElement(CssEngineServiceImpl.java:1069)
java.lang.NullPointerException