EM12c: How to fix BIP "Login failed, please retry." error?

Issue: On machine reboot, when EM is started. BIP server doesn't start on its own. One has to specifically start the BI server.

When BIP server is started via startManagedWebLogic.sh script. EM user is not be able to login to BI server and see any BIP report.

and BIP server log contains following error(s):
Exception caught while getting credentials access denied
(oracle.security.jps.service.credstore.CredentialAccessPermission  context=SYSTEM,mapName=EM,keyName=REPOS_DETAILS read)
java.security.AccessControlException: access denied
(oracle.security.jps.service.credstore.CredentialAccessPermission
context=SYSTEM,mapName=EM,keyName=REPOS_DETAILS read)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)

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EMReposLoginModuleImpl: throwing FailedLoginException: Authentication Failed: Invalid
username/password


Action: One should start/stop BI server either via weblogic admin console or via WLST commands e.g.

To start BIP serverexport WLST_PROPERTIES=-Dweblogic.security.TrustKeyStore=DemoTrust
$MW_HOME/oracle_common/common/bin/wlst.sh
connect('weblogic','<passwd>','t3s://<hostname>:<port>')
start('BIP')


To stop BIP serverexport WLST_PROPERTIES=-Dweblogic.security.TrustKeyStore=DemoTrust
$MW_HOME/oracle_common/common/bin/wlst.sh
connect('weblogic','<passwd>','t3s://<hostname>:<port>')
shutdown('BIP', force='true')