Dịch vụ UX

$FreeMarker template error:
The following has evaluated to null or missing:
==> crafter.renderComponent  [in template "templates/web/Component-Footer.ftl" at line 282, column 3]

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Tip: It's the step after the last dot that caused this error, not those before it.
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Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
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FTL stack trace ("~" means nesting-related):
	- Failed at: @crafter.renderComponent "/site/compo...  [in template "templates/web/Component-Footer.ftl" at line 282, column 1]
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Java stack trace (for programmers):
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freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
	at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
	at freemarker.core.Environment.visit(Environment.java:344)
	at freemarker.core.Environment.visit(Environment.java:350)
	at freemarker.core.Environment.process(Environment.java:323)
	at freemarker.template.Template.process(Template.java:383)
	at org.craftercms.engine.freemarker.RenderComponentDirective.processComponentTemplate(RenderComponentDirective.java:293)
	at org.craftercms.engine.freemarker.RenderComponentDirective.execute(RenderComponentDirective.java:124)
	at freemarker.core.Environment.visit(Environment.java:461)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:101)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeNestedContent(Environment.java:630)
	at freemarker.core.BodyInstruction.accept(BodyInstruction.java:60)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeNestedContent(Environment.java:630)
	at freemarker.core.BodyInstruction.accept(BodyInstruction.java:60)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.visit(Environment.java:407)
	at freemarker.core.BlockAssignment.accept(BlockAssignment.java:55)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeMacroOrFunctionCommonPart(Environment.java:886)
	at freemarker.core.Environment.invokeMacro(Environment.java:822)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:83)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeNestedContent(Environment.java:630)
	at freemarker.core.BodyInstruction.accept(BodyInstruction.java:60)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321)
	at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271)
	at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:244)
	at freemarker.core.Environment.visitIteratorBlock(Environment.java:654)
	at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:108)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94)
	at freemarker.core.Environment.visit(Environment.java:344)
	at freemarker.core.Environment.visit(Environment.java:386)
	at freemarker.core.Environment.invokeMacroOrFunctionCommonPart(Environment.java:886)
	at freemarker.core.Environment.invokeMacro(Environment.java:822)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:83)
	at freemarker.core.Environment.visit(Environment.java:344)
	at freemarker.core.Environment.visit(Environment.java:386)
	at freemarker.core.Environment.invokeNestedContent(Environment.java:630)
	at freemarker.core.BodyInstruction.accept(BodyInstruction.java:60)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.visit(Environment.java:407)
	at freemarker.core.BlockAssignment.accept(BlockAssignment.java:55)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeMacroOrFunctionCommonPart(Environment.java:886)
	at freemarker.core.Environment.invokeMacro(Environment.java:822)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:83)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeMacroOrFunctionCommonPart(Environment.java:886)
	at freemarker.core.Environment.invokeMacro(Environment.java:822)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:83)
	at freemarker.core.Environment.visit(Environment.java:380)
	at freemarker.core.Environment.invokeMacroOrFunctionCommonPart(Environment.java:886)
	at freemarker.core.Environment.invokeMacro(Environment.java:822)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:83)
	at freemarker.core.Environment.visit(Environment.java:344)
	at freemarker.core.Environment.visit(Environment.java:350)
	at freemarker.core.Environment.process(Environment.java:323)
	at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:447)
	at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:351)
	at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:302)
	at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
	at org.craftercms.engine.view.UserAgentAwareCrafterPageView.renderActualView(UserAgentAwareCrafterPageView.java:56)
	at org.craftercms.engine.view.CrafterPageView.renderMergedOutputModel(CrafterPageView.java:160)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1438)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1168)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:622)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:710)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:130)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.engine.servlet.filter.HttpHeadersRewriteFilter.doFilterInternal(HttpHeadersRewriteFilter.java:87)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:107)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.commons.web.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:62)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.engine.scripting.impl.ScriptFilter.doFilter(ScriptFilter.java:106)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.security.web.FilterChainProxy.lambda$doFilterInternal$3(FilterChainProxy.java:231)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:365)
	at org.craftercms.engine.util.spring.security.ForbiddenUrlsFilter.doFilter(ForbiddenUrlsFilter.java:57)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:117)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:125)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:131)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:85)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:179)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:150)
	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:105)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:235)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:229)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:107)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:93)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:233)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:191)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:91)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.engine.url.rewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:74)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.engine.util.spring.security.NoopFilter.doFilter(NoopFilter.java:28)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.engine.servlet.filter.ExceptionHandlingFilter.doFilter(ExceptionHandlingFilter.java:53)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.engine.servlet.filter.SiteContextResolvingFilter.doFilter(SiteContextResolvingFilter.java:77)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.craftercms.commons.http.RequestContextBindingFilter.doFilter(RequestContextBindingFilter.java:78)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:70)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.security.web.header.HeaderWriterFilter.doHeadersBefore(HeaderWriterFilter.java:82)
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:72)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:362)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:79)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:116)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:666)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:396)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:903)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1773)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:59)
	at java.base/java.lang.Thread.run(Thread.java:1583)