3294141 - Error: "500 Internal Server Error" when accessing RWB

• When accessing Runtime Workbench (RWB) tool in PI/PO system using the URL http://<PO Host>:<PO Port>/rwb/index.jsp, it is possible to see the following error:
  500 Internal Server Error
• In the XPI inspector and default traces there is also an error similar to the one below:
  500 Internal Server Error is returned for HTTP request [https://<PO Host>:<PO Port>/rwb/frames/headline.jsp]:
    component [jsp],
    web module [rwb],
    application [sap.com/com.sap.xi.rwb],
    DC name [sap.com/com.sap.xi.rwb],
    CSN component[BC-XI-IS-WKB],
    problem categorization [com.sap.ASJ.web.000137],
    internal categorization [1467379121].
  [EXCEPTION]
  java.lang.NoClassDefFoundError: JEE_jsp_rwb__frames_headline_1674283717256$1
  at JEE_jsp_rwb__frames_headline_1674283717256._jspService(JEE_jsp_rwb__frames_headline_1674283717256.java:141)
  at com.sap.engine.services.servlets_jsp.lib.jspruntime.JspBase.service(JspBase.java:102)
  at com.sap.engine.services.servlets_jsp.server.Invokable.invoke(Invokable.java:152)

• SAP NetWeaver
• SAP Process Integration

RWB, 500, Internal Server Error, NoClassDefFoundError, PIMON, frames, headline, jsp, HTMLB , KBA , BC-XI-IS-WKB , Runtime Workbench / Monitoring , Problem