too many errors to list here, but here are a few of them, everything is "error" or "not found" when i try to update
Err:52 Index of /ubuntu-ports impish-updates/universe arm64 liblightdm-gobject-1-0 arm64 1.30.0-0ubuntu4.21.10.1
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
Anyone have any ideas what i can do? Thank you (Ubuntu mate on Raspberri Pi 400)