Your error.log shows no leavu related errors, but that only means it isnt related to the lua export.
Leavu Crashes? I can run leavu for many hours straight, havent had a single crash
or disconnect yet. I need to know exactly what you mean with "crash the Leavu2".
Is it CTD, CTD without msg, bluescreen, gamecrash?
What is your setup? What computers do what, how many monitors for the game and leavu ec.
The only way I ever got leavu to crash was with Catalyst drivers 10.1 and 10.2
(which have known OpenGL issues). With 9.12 or 10.3 it works fine.
To get debug console, run leavu by "java -jar leavu.jar" from cmd console.