Dear friends,
To add on it, there is an exception as below for this issue in the systemout logs:
servlet E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0014E: Uncaught service() exception root cause controller: com.ibm.websphere.servlet.error.ServletErrorReport: java.lang.IllegalAccessError: Class com/ibm/ws/pmi/perfServlet60/XmlPrinter illegally accessing " " member of class com/ibm/websphere/product/WASProduct
Regards,
Kamlesh Sharma I