The crash you listed is one I've seen once, but haven't been able to reproduce so far which has made tracking it down difficult (it's somewhere in Kodi). It's odd you are getting this crash so often.
I'm (fairly) sure if you keep trying you should be able to connect to your network. Not ideal I know, but this situation does seem a little unusual (based on local testing and lack of similar feedback so far).
On my end it is easily reproducible. It only crashes when trying to connect to the network. And no, I can not connect to the network, even when it does not crash. This problem is nonexistent in Raspbian, implying it is a software issue.
Does LibreELEC do vnc? I can privately give you ssh, if you want to explore and reproduce the issue yourself. Unfortunately I do not have a second Pi or sd card to absolutely verify this is a software issue.