this is the error I get in app-get update
Hit:1 http:// download.opensuse.org/repositories/home:/easyrpg/xUbuntu_23.10 InRelease
Hit:2 http:// pl.archive.ubuntu.com/ubuntu noble InRelease
Hit:3 http:// pl.archive.ubuntu.com/ubuntu noble-updates InRelease
Hit:4 http:// pl.archive.ubuntu.com/ubuntu noble-backports InRelease
Hit:5 https:// repo.protonvpn.com/debian stable InRelease
Hit:6 http:// security.ubuntu.com/ubuntu noble-security InRelease
Err:1 http:// download.opensuse.org/repositories/home:/easyrpg/xUbuntu_23.10 InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 74F3DB4B6A4E28F0
Hit:7 https:// dl.winehq.org/wine-builds/ubuntu noble InRelease
Ign:8 https:// ppa.launchpadcontent.net/appimagelauncher-team/stable/ubuntu noble InRelease
Hit:9 https:// ppa.launchpadcontent.net/inkscape.dev/stable/ubuntu noble InRelease
Ign:10 https:// ppa.launchpadcontent.net/irie/blender/ubuntu noble InRelease
Err:11 https:// ppa.launchpadcontent.net/appimagelauncher-team/stable/ubuntu noble Release
404 Not Found [IP: ***]
Err:12 https:// ppa.launchpadcontent.net/irie/blender/ubuntu noble Release
404 Not Found [IP: ***]
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http:// download.opensuse.org/repositories/home:/easyrpg/xUbuntu_23.10 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 74F3DB4B6A4E28F0
E: The repository 'https:// ppa.launchpadcontent.net/appimagelauncher-team/stable/ubuntu noble Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'https://ppa.launchpadcontent.net/irie/blender/ubuntu noble Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: https:// ppa.launchpadcontent.net/inkscape.dev/stable/ubuntu/dists/noble/InRelease: Signature by key 22C4850146603F3DB0ED00479DA4BD18B9A06DE3 uses weak algorithm (rsa1024)