Hello,
I can see in your output that you have used all your space in /dev, which is stored in RAM and that’s why it is saying to you that some files don’tt have enough space.
Restart your router and you can run Updater.sh again or you can just click to Save changes button in the administration interface Foris in Updater tab, which will call Updater.sh in background.
@kmarty: Thanks. We’ll look, why the kernel module didn’t build.