I’m not sure how it’s supposed to be fixed because of the “this is a read-only copy” on the other side, but the “system options” link here is broken:
https://ubuntu.com/core/docs/gadget-snaps#heading--kernel
It points at the topic on this forum here:
But the docs page is rendered from Gadget snaps - Ubuntu Core docs - Ubuntu Community Hub I believe? That’s where the “Help improve…” link points… but then that says it’s a read-only copy! 