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java.lang.ClassCastException: org.eclipse.equinox.internal.simpleconfigurator.Activator cannot be cast to org.osgi.framework.BundleActivator	at org.eclipse.osgi.internal.framework.BundleContextImpl.loadBundleActivator(BundleContextImpl.java:755)	at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:706)	at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:936)	at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:319)	at org.eclipse.osgi.container.Module.doStart(Module.java:571)	at org.eclipse.osgi.container.Module.start(Module.java:439)	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1562)	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)	at org.eclipse.osgi.container.SystemModule.startWorker(SystemModule.java:242)	at org.eclipse.osgi.container.Module.doStart(Module.java:571)	at org.eclipse.osgi.container.Module.start(Module.java:439)	at org.eclipse.osgi.container.SystemModule.start(SystemModule.java:172)	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:393)	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:412)	at org.eclipse.osgi.launch.Equinox.start(Equinox.java:115)	at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:318)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:231)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)