ODS save as CSV returns error

LO version 24.8.3.2
LanguageTool 6.4 extension

When I save a spreadsheet as a csv file I get the following error:

An error has occurred in LanguageTool 6.4 (2024-03-28 14:05:28 +0100):
java.lang.NullPointerException
Stacktrace:
java.lang.NullPointerException
at org.languagetool.openoffice.SingleDocument$LTDokumentEventListener.documentEventOccured(SingleDocument.java:1635)
OS: Windows 11 on amd64, Java version 1.8.0_431 from Oracle Corporation

So I disabled the LT extension, and restarted.

Now I have installed WritingTool 1.0, and all seems to be OK.

Does WritingTool provide the same functionality as LT?

But what is the problem with LT 6.4?