I have the same problem on R12.2.7 and database 12.1. Single node, single instance
I did run one script again:
ant -f $JAVA_TOP/oracle/apps/fnd/txk/util/txkISGConfigurator.xml ebsSetup -DforceStop=yes -DforceDataSourceExists=true -DforceAuthenticationProviderExists=true
After this Is seems to be OK. I deploy, undeploy and deploy my service
After deploy I was able to see WADL link !!
But It stop works.
Now I can't undeploy service because I receive following message :
oracle.apps.fnd.framework.OAException: Error ocurred in fetching credentials for user : ASADMIN
Any idea how to resolve this problem?