[Sequoia] Keyboard shortcuts not working

I have a Late 2014 iMac (i7, 32 GB RAM), and the keyboard shortcuts to control the screen brightness don’t work.

It’s set by default to F14 and F15, but my keyboard only goes up to F12. I can’t assign the shortcut to F1 and F2 — it only lets me use Command, Option, or Control, and none of them work anyway.

Any idea what might be happening?

submitted by /u/extermox
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