Can't access CoreELEC system settings

I successfully installed 9.0.1 (stabled) on my Mini M8S box yesterday and everything seemed to be working fine. But today, after a reboot, I can no longer get into the CoreELEC (not Kodi) system settings page. Everything else seems to be still working though … Any thoughts on what might be causing this problem?

Never mind. I just re-installed 9.0.1 from scratched and everything is working again. Something must have gotten corrupt while I was setting up my libraries …