Roccat Vulcan keyboard no longer lights up. Why is that?

This morning I started my laptop and normally my keyboard goes on and everything else. Everything started to light up except my keyboard. I have restarted my laptop several times. Do you have any guesses?

The driver may not be up-to-date or the lighting function has been deactivated by mistake using a key combination. Just look if the drivers are up to date

My drivers are up to date. How would you reactivate the light function?

Try using FN and F4, otherwise I would try the other keys F1-F9