Error "class java.util.ArrayList cannot be cast to class wt.fc.ObjectReference" while trying to click "Promotion Request" task in Windchill PDMLink

wt.system.out wcadmin - csList[]
ERROR [ajp-nio-127.0.0.1-8010-exec-8] com.ptc.jca.error wcadmin - ---------- JCA Exception ---------- java.lang.ClassCastException: class java.util.ArrayList cannot be cast to class wt.fc.ObjectReference (java.util.ArrayList is in module java.base of loader 'bootstrap'; wt.fc.ObjectReference is in unnamed module of loader 'app')
	at ext.<XXX>
	at org.apache.jsp.WEB_002dINF.jsp.customtemplates.org59048_005fwt_maturity_PromotionNotice_005fWfTask_005fGCLPromotionNoticeJSP_005f3267320_jsp._jspService(org59048_005fwt_maturity_PromotionNotice_005fWfTask_005fGCLPromotionNoticeJSP_005f3267320_jsp.java:469)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.ptc.core.ui.validation.URLValidationFilter.doFilter(URLValidationFilter.java:86)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:578)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:517)
	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:994)
	at org.apache.jsp.netmarkets.jsp.workitem.taskFormTemplate_jsp._jspService(taskFormTemplate_jsp.java:365)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.ptc.core.ui.validation.URLValidationFilter.doFilter(URLValidationFilter.java:86)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:385)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:171)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1405)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1149)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1088)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:964)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:696)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at wt.licenseusage.licensing.LicenseFilter.doFilter(LicenseFilter.java:47)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.ptc.core.ui.validation.URLValidationFilter.doFilter(URLValidationFilter.java:86)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at wt.httpgw.filter.WTContextBeanFilter.doWithWtContextBeanHandler(WTContextBeanFilter.java:104)
	at wt.httpgw.filter.WTContextBeanFilter.doFilter(WTContextBeanFilter.java:58)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at wt.servlet.CompressionFilter.doFilter(CompressionFilter.java:301)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at wt.servlet.RequestInterrupter.doFilter(RequestInterrupter.java:335)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at wt.servlet.ServletRequestMonitor.doFilter(ServletRequestMonitor.java:1677)
	at wt.servlet.ServletRequestMonitorFilter.doFilter(ServletRequestMonitorFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:433)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1799)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:829)