Cannot Run Discoverer Viewer Report

Hi All,
please help on below issue.
I cannot run Discoverer Viewer report. I have the below error.
A connection error has occurred.
- OracleBI Discoverer was unable to complete the connection initialization.
- Insufficient privilege for attempted operation -Desktop and plus.
Environment:
E-biz: 12.0.6
DB:11.2.0.2
Discoverer: 10.1.2.55.26
I see the below error in application.log
12/07/26 13:59:43 discoverer: [ERROR] [Discoverer Viewer BG Worker 5] oracle.discoverer.applications.framework.ApplicationController._logException error.connection.failed
oracle.discoverer.applications.viewer.controllers.ControllerException: error.connection.failed
at oracle.discoverer.applications.viewer.controllers.APIController.handleApiConnectAppsSecure(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.discoverer.applications.framework.RequestProcessor.execute(Unknown Source)
at oracle.discoverer.applications.framework.WorkerThread.run(Unknown Source)
at java.lang.Thread.run(Thread.java:662)
Caused by: oracle.discoverer.applications.viewer.model.ConnectionException: error.setup.connection
at oracle.discoverer.applications.viewer.model.RelationalConnection.connect(Unknown Source)
at oracle.discoverer.applications.viewer.model.DirectConnection.connectAppsSecure(Unknown Source)
... 8 more
Caused by: oracle.discoiv.beans.EulException: Insufficient privilege for attempted operation - Desktop and Plus
at oracle.discoiv.beans.proxy.server.DiscovererServer$ConnectionErrorChecker.check(DiscovererServer.java:956)
at oracle.discoiv.beans.proxy.server.DiscovererServer.assessErrors(DiscovererServer.java:775)
at oracle.discoiv.beans.proxy.server.DiscovererServer.findConnectionErrors(DiscovererServer.java:833)
at oracle.discoiv.beans.proxy.server.DiscovererServer.findErrors(DiscovererServer.java:731)
at oracle.discoiv.beans.proxy.server.DiscovererServer.loadDocument(DiscovererServer.java:652)
at oracle.discoiv.beans.proxy.server.DiscovererServer.getDocument(DiscovererServer.java:204)
at oracle.discoiv.beans.proxy.XMLProxy.getElement(XMLProxy.java:189)
at oracle.discoiv.beans.proxy.XMLProxy.connect(XMLProxy.java:338)
at oracle.discoiv.beans.proxy.ConnectionStoreProxy.connect(ConnectionStoreProxy.java:584)
at oracle.discoiv.beans.ConnectionStore.connect(ConnectionStore.java:402)
... 10 more
please advice on this issue ASAP.
Thanks in advance.
Regards
Komuraiah

Please see these docs.
Creating Public Connection Errors With 'Cannot get a list of connections. IO exception: Connection reset' [ID 362264.1]
Connecting To An Applications Mode EUL With Discoverer 10g Plus/Viewer Fails With 'PLS-00302: component 'IS_PWD_EXPIRED' (10.1.2) [ID 566737.1]
Contact With Backend Server Lost, OracleBI Discoverer Viewer Was Unable To Find The Necessary Data For Displaying The Results Of This Event. [ID 412905.1]
Connect To Discoverer Plus Or Viewer (Installed on AIX Server) Results In: No Process To Read Data Written To A Pipe [ID 561148.1]
"Connection Failed" Error Encountered When Logging into Discoverer Viewer [ID 434846.1]
Is the JDBC Patch 4398431 required on standalone Discoverer middletiers? [ID 1330378.1]
Thanks,
Hussein

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Regards,
Anuj Malhotra.

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