templates can cause error showing folder

tomee;localhost.log;dev;ICP;2021-05-20 19:41:01,715 [ajp-nio-0.0.0.0-8009-exec-4] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/grouper].[jsp]- Servlet.service() for servlet [jsp] threw exceptiontomee;localhost.log;dev;ICP;2021-05-20 19:41:01,715 [ajp-nio-0.0.0.0-8009-exec-4] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/grouper].[jsp]- Servlet.service() for servlet [jsp] threw exception

java.lang.NullPointerException: null

 at edu.internet2.middleware.grouper.grouperUi.beans.ui.StemTemplateContainer$2.compare(StemTemplateContainer.java:351) ~[grouper-ui-2.5.50.jar:2.5.50]

 at edu.internet2.middleware.grouper.grouperUi.beans.ui.StemTemplateContainer$2.compare(StemTemplateContainer.java:348) ~[grouper-ui-2.5.50.jar:2.5.50]

 at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355) ~[?:1.8.0_292]

 at java.util.TimSort.sort(TimSort.java:220) ~[?:1.8.0_292]

 at java.util.Arrays.sort(Arrays.java:1438) ~[?:1.8.0_292]

 at java.util.List.sort(List.java:478) ~[?:1.8.0_292]

 at java.util.Collections.sort(Collections.java:177) ~[?:1.8.0_292]

 at edu.internet2.middleware.grouper.grouperUi.beans.ui.StemTemplateContainer.templatesToShowHelper(StemTemplateContainer.java:348) ~[grouper-ui-2.5.50.jar:2.5.50]

 at edu.internet2.middleware.grouper.grouperUi.beans.ui.StemTemplateContainer.getTemplatesToShowInMoreActions(StemTemplateContainer.java:269) ~[grouper-ui-2.5.50.jar:2.5.50]

 at sun.reflect.GeneratedMethodAccessor833.invoke(Unknown Source) ~[?:?]

 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]

 at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]

 at javax.el.BeanELResolver.getValue(BeanELResolver.java:94) ~[el-api.jar:3.0.FR]

 at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:113) ~[jasper.jar:8.5.57]

 at org.apache.el.parser.AstValue.getValue(AstValue.java:169) ~[jasper-el.jar:8.5.57]

 at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:190) ~[jasper-el.jar:8.5.57]

 at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:944) ~[jasper.jar:8.5.57]

 at org.apache.jsp.WEB_002dINF.grouperUi2.stem.viewStem_jsp._jspx_meth_c_005fforEach_005f2(viewStem_jsp.java:1988) ~[?:?]

 at org.apache.jsp.WEB_002dINF.grouperUi2.stem.viewStem_jsp._jspx_meth_c_005fif_005f15(viewStem_jsp.java:1956) ~[?:?]

 at org.apache.jsp.WEB_002dINF.grouperUi2.stem.viewStem_jsp._jspService(viewStem_jsp.java:466) ~[?:?]

 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:71) ~[jasper.jar:8.5.57]

 at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[servlet-api.jar:?]

 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476) ~[jasper.jar:8.5.57]