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FreeMarker template error (DEBUG mode; use RETHROW in production!): The following has evaluated to null or missing: ==> item.content [in template "content/content.ftl" at line 23, column 19] ---- Tip: It's the step after the last dot that caused this error, not those before it. ---- 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)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${item.content} [in template "content/content.ftl" at line 23, column 17] - Reached through: @Content contentId=contentId; item [in template "content/content.ftl" at line 1, column 1] - Reached through: #include "content/content.ftl" [in template "content.ftl" at line 6, column 1] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:490) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:410) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:379) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:380) at freemarker.core.Environment$NestedElementTemplateDirectiveBody.render(Environment.java:3458) at cn.iocoder.yudao.module.cms.web.directive.content.ContentDirective.execute(ContentDirective.java:60) at freemarker.core.Environment.visit(Environment.java:461) at freemarker.core.UnifiedCall.accept(UnifiedCall.java:101) at freemarker.core.Environment.visit(Environment.java:344) at freemarker.core.Environment.include(Environment.java:3139) at freemarker.core.Include.accept(Include.java:171) 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 cn.iocoder.yudao.module.cms.service.generate.impl.GenerateServiceImpl.handleProcess(GenerateServiceImpl.java:515) at cn.iocoder.yudao.module.cms.service.generate.impl.GenerateServiceImpl.handleContentProcess(GenerateServiceImpl.java:371) at cn.iocoder.yudao.module.cms.service.generate.impl.GenerateServiceImpl.contentGenerate(GenerateServiceImpl.java:286) at cn.iocoder.yudao.module.cms.service.content.ContentServiceImpl.lambda$triggerAsyncGeneration$0(ContentServiceImpl.java:521) at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source) at com.alibaba.ttl.TtlRunnable.run(TtlRunnable.java:60) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source)