bom dia galera
estou com o mesmo erro no tomcat e no glassfish
TOMCAT
GRAVE: Error configuring application listener of class com.sun.faces.application.ServletContextSensitiveSingletonStore
java.lang.InstantiationException: com.sun.faces.application.ServletContextSensitiveSingletonStore
GLASSFISH
Deployment Error for module: JSF2: Exception while loading the app : java.lang.Exception: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.IllegalArgumentException: javax.servlet.ServletException: com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class com.sun.faces.application.ServletContextSensitiveSingletonStore
estou usando Java Server Face
Grato