Lenovo Legion Go - Error screen after fresh install

Hi!, Just tried installing bazzite-deck-stable and everything flows smoothly - I follow the guide, enable network, check the destination disk drive, make a user account and click install. All good.

The issue is when I get to the MOK management screen, then the GRUB screen where I choose what to boot into, I choose the 1st option.

When I do, and I get two errors:

" error:../../grub-core/kern/efi/sb.c:182:bad shim signature.
error:../../grub-core/loader/i386/efi/linux.c:258: you need to load the kernel first. "

And when I press a key to continue, it just puts me back at the GRUB menu.

I honestly don't know where else to ask. Does anyone have any idea what I'm doing wrong?
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