LanguageTool does not launch (blank window)

I fail to open the stand-alone languagetool.jar (from LT 6.1, Windows 10, java8)

When I click the file, only a blank window opens. The same thing happens with LanguageTool 5.5. When running it with command line java -jar languagetool.jar I first get…

WARN: no common words file defined for Japanese
WARN: no common words file defined for Khmer

…then a blank window opens.

Maybe this is more a java issue than something related to LT? I have to configure the languagetool.jar to make it work with TexStudio

Which version of Java do you use? java -version will tell you. Also, could you post a screenshot of the empty window?

I’m using:

java version “1.8.0_371”
Java™ SE Runtime Environment (build 1.8.0_371-b11)
Java HotSpot™ 64-Bit Server VM (build 25.371-b11, mixed mode)

PS: I tested another .jar file and it works fine. I also have seen that on the java website they mentioned that anti-aliasing options of the graphics card could be responsible for this, but this post seemed like it was a little old.