The following has evaluated to null or missing:
==> Site.PublishPipeName  [in template "51126_2hao/template/catalog.template.html" at line 6, column 28]

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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</#if>. (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: ${Site.PublishPipeName}  [in template "51126_2hao/template/catalog.template.html" at line 6, column 26]
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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.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:486)
	at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:406)
	at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:375)
	at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:63)
	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 com.chestnut.common.staticize.StaticizeService.process(StaticizeService.java:95)
	at com.chestnut.contentcore.service.impl.PublishServiceImpl.doCatalogStaticize(PublishServiceImpl.java:597)
	at com.chestnut.contentcore.service.impl.PublishServiceImpl.catalogStaticize(PublishServiceImpl.java:518)
	at com.chestnut.contentcore.service.impl.PublishServiceImpl.catalogStaticize(PublishServiceImpl.java:503)
	at com.chestnut.contentcore.publish.CatalogPublishTask.publish(CatalogPublishTask.java:58)
	at com.chestnut.contentcore.publish.PublishTaskReceiver.onMessage(PublishTaskReceiver.java:57)
	at com.chestnut.contentcore.publish.PublishTaskReceiver.onMessage(PublishTaskReceiver.java:37)
	at org.springframework.data.redis.stream.StreamPollTask.deserializeAndEmitRecords(StreamPollTask.java:157)
	at org.springframework.data.redis.stream.StreamPollTask.doLoop(StreamPollTask.java:128)
	at org.springframework.data.redis.stream.StreamPollTask.run(StreamPollTask.java:112)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)