Error on CADDoc content tab

Users just starting reporting this error message on the content tab for CAD docs. I checked and this class does exist in the wncWeb.jar file and that file does exist. As far as I know, nothing has changed to system and we've been operating normally for 6 days.

An exception occured while processing the request.

java.lang.NoClassDefFoundError: Could not initialize class com.ptc.windchill.uwgm.cadx.caddoc.topattrspanel.TopAttribsPanelProcessorService
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:315)
	at wt.enterprise.BasicTemplateProcessor.useProcessorService(BasicTemplateProcessor.java:10330)
	at jdk.internal.reflect.GeneratedMethodAccessor7570.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at wt.htmlutil.MethodAction.action(MethodAction.java:132)
	at wt.htmlutil.CachedHTMLTemplate.execute(CachedHTMLTemplate.java:162)
	at wt.htmlutil.CachedHTMLTemplate.execute(CachedHTMLTemplate.java:123)
	at wt.htmlutil.HTMLTemplate.process(HTMLTemplate.java:229)
	at wt.templateutil.processor.SubTemplateService.processTemplate(SubTemplateService.java:882)
	at wt.templateutil.processor.SubTemplateService.processTemplate(SubTemplateService.java:468)
	at wt.enterprise.BasicTemplateProcessor.processSubTemplate(BasicTemplateProcessor.java:10054)
	at com.ptc.core.htmlcomp.PageProcessor.displayApplicationHeader(PageProcessor.java:189)
	at jdk.internal.reflect.GeneratedMethodAccessor6038.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at wt.htmlutil.MethodAction.action(MethodAction.java:132)

 Opened a ticket but at a loss since I think error message is not accurate.