2049621 - Unable to login to PI ESR and Directory

• When logging in to the Process Integration (PI) Enterprise Services Repository (ESR) or Integration Builder Directory, you get one of the errors below:
• Single Sign On failed
  
• Authorization error; unknown user name or incorrect password
  
• If you run the Java console trace as per SAP Note 1891480 How to enable logging in Java WebStart console, you will find a more detailed error as below:
• Thrown:
  com.sap.aii.ib.core.login.UserAuthenticationException: Single Sign-On failed
  at com.sap.aii.ib.clsif.login.EJBHomeFactory.handleAuthException(EJBHomeFactory.java:747)...
  

  ...Caused by: com.sap.engine.services.security.exceptions.BaseLoginException: Exception in remote login.
  at com.sap.engine.services.security.remote.login.RemoteLoginContext.login(RemoteLoginContext.java:177...
  ...Caused by: java.rmi.RemoteException: ERROR: ; nested exception is:
  java.lang.NoClassDefFoundError: com/sap/engine/interfaces/security/auth/HeaderVariableCallback

• Thrown:
  com.sap.aii.ib.core.login.UserAuthenticationException: Authorization error; unknown user name or incorrect password...
  ...Caused by: java.rmi.RemoteException: ERROR : ; nested exception is: java.lang.NoClassDefFoundError:
  com/sap/engine/interfaces/security/auth/HeaderVariableCallback

• SAP NetWeaver Process Integration 7.1
• SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1
• SAP NetWeaver 7.3
• SAP enhancement package 1 for SAP NetWeaver 7.3
• SAP NetWeaver 7.4
• SAP NetWeaver 7.5

Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.4, PI 7.4, PO 7.4, Process Orchestration 7.5, PI 7.5, PO 7.5, XI, AEX, IBD, Problem when Logging On , KBA , BC-XI-IBD , Integration Builder - Design , BC-XI-IBC , Integration Builder - Configuration , BC-XI-IBF , Framework , Problem