Addon problems

Unable to install Writer2Latex
platorm: Linux Mint 17, english
LibreOffice Writer Version: 4.2.7.2 Build ID: 420m0(Build:2)

I got Writer2Latex from here:
http://extensions.libreoffice.org/extension-center?getCategories=&getCompatibility=any&sort_on=positive_ratings&path=%2FLibreOffice-Extensions-and-Templates%2Fextension-center&portal_type=PSCProject&SearchableText=writer2latex

Then tried to install Writer2Latex using Extension Manager

I got the following error when I tried to add Writer2Latex in LibreOffice Writer:
"java.lang.reflect.InvocationTargetException"

Please advice.
Thank you.

Hello admin:

When I use this “Unable to install Writer2Later” as title, I was not able to post my question.
Why?