I'm having the same issue with version 04.30.70, LGwebostv uh6035 is the model information that i got off the tv.
For me, it was crashing out when i had an Apple TV connected to the HDMI 1 (i had to resort to watching netflix via the apple tv since when i used the built in app on the tv, it would crash)
But now, even when an app isn't used, and it's just on HDMI1 it crashed with the same error.
I called support and they suggested that i do a reset. i did that and i then tried using it again, and so far i haven't had any issues. The apps take a while to launch, but that's about it. I'm going to keep an eye on it, and call "advanced technical support" if it still doesn't work.
This is SO annoying.