Thank you! I installed JDK 24.01 and upgraded to LangugageTool 0.4.6, what I have been missing before, and now everything works well. The reason why I had installed the above mentioned Java version is that the link in #1 points to this one.
By the way: In the LanguageTool.json I set
Code:
"clipboard_copy": true,
but there appears no hint to a successful copy. Is there something wrong?