What should I do in the following situation?
After APM CE (CEM) configuration changes, a TIM monitor sync fails with a "Monitor Configuration Status" of "Communication Error 500" showing plugin load failure.
Also, the TIM becomes disabled:
<Please see attached file for image>

Other information:
"Domain Configuration Status" shows as
"Normal" "Monitor Configuration Status" shows
"Communication Error 500"Clicking on the
"Communication Error 500" link or checking the MOM log may show a plugin load error e.g.
TIM Error:
Monitor Configuration Status: Communication Error 500
500 Error cannot load plugin "53" while it is enabled
MOM Error:
INFO | jvm 7 |<Date & Time> [ERROR] [Thread-XX] [Manager.com.timestock.tess.services.tim.TimIo] cannot send plugin to monitor id=nnnnnnnnnnn: Communication Error 500: 500 Error
INFO | jvm 7 | <Date & Time> | cannot load plugin "53" while it is enabled