Welcome to the forum & Garuda 
Im pretty sure that this is caused by a recent grub-btrfs update, please try downgrading this package to the previous version by
sudo downgrade grub-btrfs
and update grub again afterwards.
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Welcome to the forum & Garuda
Im pretty sure that this is caused by a recent grub-btrfs update, please try downgrading this package to the previous version by
sudo downgrade grub-btrfs
and update grub again afterwards.