No site specified or site not found...

Hi,

I duplicated a production jahia web site into a development workstation and
I've got the exception below. The default url is
http://localhost:8080/Jahia, so without any default site specified. Where
does the problem comme from:

51124 [http-8080-Processor3] ERROR - ERROR : 400 Bad Request : No site
specified or site not found, Jahia virtual site error
org.jahia.exceptions.JahiaSiteNotFoundException: 400 Bad Request : No site
specified or site not found, Jahia virtual site error
        at org.jahia.params.ParamBean.<init>(ParamBean.java:444)
        at org.jahia.bin.Jahia.service(Jahia.java:828)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
        at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
        at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
        at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
        at java.lang.Thread.run(Thread.java:534)