Launcher don't start

[Safia_Aurelya]

Hey,
I have the problem that the launcher doesnt start.
i start it in the console and got this:

./rolauncher: error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory

I can start the game under steam but iam not sure which version is it 32 bit or 64 bit ?

but if i start the game i have video errors showin in the video:

https://mega.nz/#!EDRyAIAS!k31SspeRo...5RrC_EGjMDVdQg



I use Linux Mint 64 bit and use the driver from Nvidia Homepage, i had install it because it run with the proprity driver with the same video errors.

sry for my bad english but in the german section i got no answers....

best regards