Range end index 100 is out of bounds, because the sliced string has only 100 character(s). (Note that indices are 0-based).
The blamed expression:
==> 0..100  [in template "ceprei_pc/template/detail_news.template.html" at line 21, column 74]

----
FTL stack trace ("~" means nesting-related):
	- Failed at: ${clearHtmlTag(cc)[0..100]}  [in template "ceprei_pc/template/detail_news.template.html" at line 21, column 55]
	- Reached through: @cms_article contentId="${Content.con...  [in template "ceprei_pc/template/detail_news.template.html" at line 17, column 9]
----

Java stack trace (for programmers):
----
freemarker.core._MiscTemplateException: [... Exception message was already printed; see it above ...]
	at freemarker.core.DynamicKeyName.dealWithRangeKey(DynamicKeyName.java:270)
	at freemarker.core.DynamicKeyName._eval(DynamicKeyName.java:89)
	at freemarker.core.Expression.eval(Expression.java:101)
	at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:63)
	at freemarker.core.Environment.visit(Environment.java:335)
	at freemarker.core.Environment.visit(Environment.java:377)
	at freemarker.core.Environment$NestedElementTemplateDirectiveBody.render(Environment.java:3423)
	at com.chestnut.common.staticize.tag.AbstractTag.onTagEnd(AbstractTag.java:96)
	at com.chestnut.common.staticize.tag.AbstractTag.execute(AbstractTag.java:65)
	at freemarker.core.Environment.visit(Environment.java:452)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:102)
	at freemarker.core.Environment.visit(Environment.java:335)
	at freemarker.core.Environment.visit(Environment.java:341)
	at freemarker.core.Environment.visit(Environment.java:341)
	at freemarker.core.Environment.process(Environment.java:314)
	at com.chestnut.common.staticize.StaticizeService.process(StaticizeService.java:93)
	at com.chestnut.contentcore.publish.staticize.ContentStaticizeType.doContentStaticize(ContentStaticizeType.java:130)
	at com.chestnut.contentcore.publish.staticize.ContentStaticizeType.contentStaticize(ContentStaticizeType.java:89)
	at com.chestnut.contentcore.publish.staticize.ContentStaticizeType.staticize(ContentStaticizeType.java:80)
	at com.chestnut.contentcore.publish.strategies.ThreadPoolPublishStrategy.lambda$publish$0(ThreadPoolPublishStrategy.java:59)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)