Error while opening Help

[nlisker]

Pressing F1 to open Help in Eclipse causes:

Parse error occurred while adding document /de.jcup.egradle.eclipse.plugin.main/html/user_guide/junit-integration.html to search index C:\Dev\Minimal 4.33\configuration\org.eclipse.help.base\index\en_US.

org.apache.lucene.demo.html.ParseException: Encountered "\"" at line 66, column 37.
Was expecting one of:
    <ArgName> ...
    <TagEnd> ...
    
	at org.apache.lucene.demo.html.HTMLParser.generateParseException(HTMLParser.java:694)
	at org.apache.lucene.demo.html.HTMLParser.jj_consume_token(HTMLParser.java:575)
	at org.apache.lucene.demo.html.HTMLParser.Tag(HTMLParser.java:299)
	at org.apache.lucene.demo.html.HTMLParser.HTMLDocument(HTMLParser.java:192)
	at org.apache.lucene.demo.html.HTMLParser.parse(HTMLParser.java:95)
	at org.eclipse.help.internal.search.HTMLDocParser.openDocument(HTMLDocParser.java:92)
	at org.eclipse.help.internal.search.HTMLSearchParticipant.addDocument(HTMLSearchParticipant.java:64)
	at org.eclipse.help.internal.search.SearchIndex.addDocument(SearchIndex.java:264)
	at org.eclipse.help.internal.search.IndexingOperation.addDocuments(IndexingOperation.java:248)
	at org.eclipse.help.internal.search.IndexingOperation.addNewDocuments(IndexingOperation.java:159)
	at org.eclipse.help.internal.search.IndexingOperation.execute(IndexingOperation.java:108)
	at org.eclipse.help.internal.search.LocalSearchManager.updateIndex(LocalSearchManager.java:622)
	at org.eclipse.help.internal.search.LocalSearchManager.ensureIndexUpdated(LocalSearchManager.java:596)
	at org.eclipse.help.internal.search.federated.IndexerJob.run(IndexerJob.java:35)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

eclipse.buildId=4.33.0.I20240903-0240 java.version=21.0.2 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Command-line arguments: -os win32 -ws win32 -arch x86_64