Expression channel is undefined on line 29, column 21 in default/data/include/infomation_left.ftl.
The problematic instruction:
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==> ${channel.id} [on line 29, column 19 in default/data/include/infomation_left.ftl]
 in include "./default/data/include/infomation_left.ftl" [on line 15, column 25 in default/data/information.ftl]
----------

Java backtrace for programmers:
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freemarker.core.InvalidReferenceException: Expression channel is undefined on line 29, column 21 in default/data/include/infomation_left.ftl.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)
	at freemarker.core.Dot._getAsTemplateModel(Dot.java:78)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:209)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:209)
	at freemarker.core.Environment.include(Environment.java:1482)
	at freemarker.core.Include.accept(Include.java:169)
	at freemarker.core.Environment.visit(Environment.java:209)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:209)
	at freemarker.core.Environment.process(Environment.java:189)
	at freemarker.template.Template.process(Template.java:237)
	at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:366)
	at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:283)
	at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:233)
	at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
	at com.apusic.web.container.ServletComponent.service(ServletComponent.java:87)
	at com.apusic.web.container.ServletFilterWrapper.doFilter(ServletFilterWrapper.java:38)
	at com.apusic.web.container.FilterChainImpl.doFilter(FilterChainImpl.java:48)
	at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:290)
	at com.apusic.web.container.FilterComponent.doFilter(FilterComponent.java:65)
	at com.apusic.web.container.FilterChainImpl.performFilter(FilterChainImpl.java:38)
	at com.apusic.web.container.FilterChainImpl.doFilter(FilterChainImpl.java:45)
	at com.gx.core.filter.InjectFilter.doFilter(InjectFilter.java:34)
	at com.apusic.web.container.FilterComponent.doFilter(FilterComponent.java:65)
	at com.apusic.web.container.FilterChainImpl.performFilter(FilterChainImpl.java:38)
	at com.apusic.web.container.FilterChainImpl.doFilter(FilterChainImpl.java:45)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at com.apusic.web.container.FilterComponent.doFilter(FilterComponent.java:65)
	at com.apusic.web.container.FilterChainImpl.performFilter(FilterChainImpl.java:38)
	at com.apusic.web.container.WebContainer.invoke(WebContainer.java:1115)
	at com.apusic.web.container.WebContainer.doProcessRequest(WebContainer.java:905)
	at com.apusic.web.container.WebContainer.processRequest(WebContainer.java:800)
	at com.apusic.web.http.VirtualHost.processRequest(VirtualHost.java:369)
	at com.apusic.web.http.HttpServer.processRequest(HttpServer.java:317)
	at com.apusic.web.http.HttpConnectionHandler.service(HttpConnectionHandler.java:26)
	at com.apusic.web.http.ConnectionHandler.processRequest(ConnectionHandler.java:303)
	at com.apusic.web.http.ConnectionHandler.processConnection(ConnectionHandler.java:129)
	at com.apusic.web.http.ConnectionHandler.run(ConnectionHandler.java:45)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)