3553801 - Connection to system REPOSITORY using application REPOSITORY lost

You are getting the following error while you try to access PI tools (ESR and Integration Builder):

Connection to system REPOSITORY using application REPOSITORY lost. Detailed information: Error accessing "http://XXXXXXXX" with user "PIDIRXXX". Response code is 401, response message is "Not Found"
    at com.sap.aii.utilxi.hmi.api.HmiCoreException.newCommunicationError(HmiCoreException.java:85)
    at com.sap.aii.utilxi.hmi.api.HmiHttpJDKClient.checkResponseCode(HmiHttpJDKClient.java:402)
    at com.sap.aii.utilxi.hmi.api.HmiHttpJDKClient.executeHmiCall(HmiHttpJDKClient.java:180)
    at com.sap.aii.utilxi.hmi.api.HmiHttpJDKClient.doPostCall(HmiHttpJDKClient.java:314)
    at com.sap.aii.utilxi.hmi.api.HmiHttpJDKClient.sendRequestAndReceiveResponse(HmiHttpJDKClient.java:354)
    at com.sap.aii.utilxi.hmi.api.HmiClientAdapter.invokeMethod(HmiClientAdapter.java:92)
    at com.sap.aii.ibdir.server.container.access.ContainerAccessDirServer.getContainers(ContainerAccessDirServer.java:142)
    at com.sap.aii.ib.server.container.access.InternalSpecialQueryContainerAccess.specialQuery(InternalSpecialQueryContainerAccess.java:45)
    at com.sap.aii.ib.server.query.SpecialQueryServiceProvider$SpecialQueryServiceImpl.specialQuery(SpecialQueryServiceProvider.java:63)
    at com.sap.aii.ib.server.query.QueryServiceImpl.specialQuery(QueryServiceImpl.java:536)
    at com.sap.aii.ib.server.query.QueryServiceBean.specialQuery(QueryServiceBean.java:112)
    at sun.reflect.GeneratedMethodAccessor755.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)

SAP NetWeaver all versions

PI tools, ESR, Integration Builder, Connection to system REPOSITORY using application REPOSITORY lost, Error accessing, with user, PDIR, Response code is 401, response message is "Not Found",com.sap.aii.utilxi.hmi.api.HmiCoreException.newCommunicationError , KBA , BC-XI-IBF-LGN , Login/Log off for ESR / IB , Problem