Those 2 errors mean that you have a too old Linux distribution. Or that mine is too new. I build the ARM version on Raspbian (which, just like Bananian, is Debian based). I just found that they stopped with Bananian:
https://www.bananian.org/news#the_end_-_2017-04-02 so that probably explains it.
The LXDE output means that ST is running (the Mix warning is normal, that's actually a note to myself that I should optimize that code
), but you say that the GUI doesn't show. That can happen (not sure why). Can you retry it a few times? I don't know the cause but I have seen a Linux distribution in the past which had a similar behavior. I would expect a line in the output saying that it cannot open the GUI and will run without.