Failed to get Messages for target /Farm_portaldomain/portaldomain/WLS_WSRP/DMS Application(11.1.1.1.0),

Lately, after application software is installed, one of our environment is experiencing the following errors in the EM (weblogic Enterprise Manager) when opening log message on WLS_WSRP server.

"
Failed to get Messages for target /Farm_portaldomain/portaldomain/WLS_WSRP/DMS Application(11.1.1.1.0), /Farm_portaldomain/portaldomain/WLS_WSRP/webapp, /Farm_portaldomain/portaldomain/WLS_WSRP/wsil-wls, /Farm_portaldomain/portaldomain/WLS_WSRP. "

and our application logs are not coming out.

Checked all logs, especially logs in the WLS_WSRP domain. Nothing related is found.
Checked logs in WLS_Portal domain and Admin Server, everything is fine.


Then checked output file WLS_WSRP.out. Going all the way back and found parsing error complaining about logging configuration file logging.xml is having syntax errors.