I can't use the rtcwake command, I get the following error:

[root@arch censored]# rtcwake --seconds 10 -m mem rtcwake: wakeup from "mem" using /dev/rtc0 at Thu Dec 2 18:54:21 2021 rtcwake: write error root@arch censored]# 

Any Ideas why?

I'm using normal arch linux with the newest version. Let me know if I should add infos. Thanks to any answer!