[Extension Registry Event Dispatcher] ERROR

I've upgraded to RQM 2.0.1.1 iFix4 from iFix3 and now I'm getting the following error when starting up the RQM server.

Do someone know how to fix it? Thanks in advance for help.

ERROR ax.internal.framework.OSGiJazzAjaxFrameworkContext - NamespaceException while registering servlet for alias
org.osgi.service.http.NamespaceException: The alias '/setup' is already in use.
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.checkAlias(ProxyServlet.java:169)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.registerServlet(ProxyServlet.java:132)
at org.eclipse.equinox.http.servlet.internal.HttpServiceImpl.registerServlet(HttpServiceImpl.java:59)
at net.jazz.ajax.internal.framework.OSGiJazzAjaxFrameworkContext.registerServlet(OSGiJazzAjaxFrameworkContext.java:82)
at net.jazz.ajax.internal.JazzAjaxFrameworkServiceImpl.registerAjaxApplications(JazzAjaxFrameworkServiceImpl.java:386)
at net.jazz.ajax.internal.JazzAjaxFrameworkServiceImpl.registerAjaxApplication(JazzAjaxFrameworkServiceImpl.java:343)
at net.jazz.ajax.internal.registry.WebUIRegistryReader.registryChanged(WebUIRegistryReader.java:466)
at net.jazz.ajax.internal.registry.ClientLocalizingRegistryStrategy$RegistryChangeListener.registryChanged(ClientLocalizingRegistryStrategy.java:147)
at org.eclipse.core.internal.registry.ExtensionRegistry$2.run(ExtensionRegistry.java:884)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
at org.eclipse.core.internal.registry.ExtensionRegistry.processChangeEvent(ExtensionRegistry.java:882)
at org.eclipse.core.internal.registry.ExtensionRegistry$RegistryEventThread.run(ExtensionRegistry.java:970)