Of course you are going to have problems. That's what we told you in your original post.
Lubuntu is not a supported platform. We don't actively test our software againsta that distro nor do fixes.
If you are a commercial organization ask for it to be supported in the Idea Exchange forum. If we get enough paying customers behind that distro, then it will be added to the portfolio.
The list of supported platforms is in the Express download page.
R.P