I had that with a laptop that I did not update for a month or more. Could that be the case?
If so, this helped me
If you’re getting an error similar to “Can’t update: signature from *** is marginal trust” or “invalid or corrupted package” you probably just need to update your package signing keys:
sudo pacman -Sy archlinux-keyring endeavouros-keyring
sudo pacman -Syu
Also make sure your system clock is correct!
Of course, it’s also possible that the package file actually is corrupt. Remove it from /var/cache/pacman/pkg/ so pacman will download it again.
If no package file is explicitly mentioned then yo…
Don’t forget to sudo grub-install after the update worked but before rebooting to avoid the recent grub problem. Assuming you did not update for a while… Else you are going to be stuck in an unbootable system.
(Grub 2:2.06.r322.gd9b4638c5-1)
ht…