It's a Kobo Aura One, firmware 4.6.9995. I don't know if it matters but I'm starting Plato from Kobo Start Menu instead of Nickel.
I can't make a video but tshering's rotation fix fixes the file selector too. But KSM gets totally confused after exiting from Plato.
crash.log:
Screenshot (it has been rotated to reflect how it looks):