Method Server is failing to start on the Slave Node in Windchill PDMLink

• After a Windchill Server reboot, Windchill won't start
• Windchill unable startup during Upgrade process
• MethodServer/ServeManager reports following error:

ERROR [main] wt.intersvrcom - Error in static initializer java.rmi.RemoteException: Failed to obtain MasterCacheMonitor instance; nested exception is: 
	java.lang.NullPointerException
	at wt.cache.MasterCacheMonitor.getInstance(MasterCacheMonitor.java:80)
	at wt.cache.CacheManager.<init>(CacheManager.java:595)
	at wt.intersvrcom.SiteInfoCache.<init>(SiteInfoCache.java:138)
	at wt.intersvrcom.StandardInterSvrComService.<clinit>(StandardInterSvrComService.java:394)
	at wt.manager.ServerManagerMain.main(ServerManagerMain.java:228)
Caused by: java.lang.NullPointerException
	at wt.cache.MasterCacheMonitor.getInstance(MasterCacheMonitor.java:72)
	... 25 more
INFO  [main] wt.system.err - Exception in thread "main" org.apache.logging.log4j.core.appender.AppenderLoggingException: java.lang.NoClassDefFoundError: Could not initialize class wt.intersvrcom.StandardInterSvrComService
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:165)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:134)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:125)
	at wt.manager.ServerManagerMain.main(ServerManagerMain.java:238)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class wt.intersvrcom.StandardInterSvrComService
	at java.base/java.lang.Class.forName0(Native Method)
	at wt.log4j.jmx.AsyncJDBCAppender.append(AsyncJDBCAppender.java:845)
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:161)
	... 16 more”