Graphic drivers and basic update error - PPAs (daniruiz/flat-remix and snwh/pulp)

[nikhilt222]

Hit:1 https://repo.radeon.com/amdgpu/6.4.1/ubuntu noble InRelease
Hit:3 https://repo.radeon.com/rocm/apt/6.4.1 noble InRelease
Hit:4 https://packages.mozilla.org/apt mozilla InRelease
Hit:5 https://dl.google.com/linux/chrome/deb stable InRelease
Ign:6 http://linux.dropbox.com/ubuntu noble InRelease
Hit:7 http://us.archive.ubuntu.com/ubuntu noble InRelease
Hit:8 http://security.ubuntu.com/ubuntu noble-security InRelease
Hit:2 https://repo.linuxliteos.com/linuxlite galena InRelease
Ign:9 https://ppa.launchpadcontent.net/danirui...mix/ubuntu noble InRelease
Hit:10 http://us.archive.ubuntu.com/ubuntu noble-updates InRelease
Hit:11 http://linux.dropbox.com/ubuntu noble Release
Hit:12 https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu noble InRelease
Hit:13 https://ppa.launchpadcontent.net/mozilla...ext/ubuntu noble InRelease
Get:14 http://us.archive.ubuntu.com/ubuntu noble-backports InRelease [126 kB]
Ign:15 https://ppa.launchpadcontent.net/snwh/pulp/ubuntu noble InRelease
Err:16 https://ppa.launchpadcontent.net/danirui...mix/ubuntu noble Release
  404  Not Found [IP: 185.125.190.80 443]
Err:18 https://ppa.launchpadcontent.net/snwh/pulp/ubuntu noble Release
  404  Not Found [IP: 185.125.190.80 443]
Get:19 http://us.archive.ubuntu.com/ubuntu noble-backports/main amd64 Components [7,084 B]
Get:20 http://us.archive.ubuntu.com/ubuntu noble-backports/restricted amd64 Components [216 B]
Get:21 http://us.archive.ubuntu.com/ubuntu noble-backports/universe amd64 Components [16.4 kB]
Get:22 http://us.archive.ubuntu.com/ubuntu noble-backports/multiverse amd64 Components [212 B]
Reading package lists...
E: The repository 'https://ppa.launchpadcontent.net/daniruiz/flat-remix/ubuntu noble Release' does not have a Release file.
E: The repository 'https://ppa.launchpadcontent.net/snwh/pulp/ubuntu noble Release' does not have a Release file.
W: https://ppa.launchpadcontent.net/mozilla.../InRelease: Signature by key 0AB215679C571D1C8325275B9BDB3D89CE49EC21 uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/mozilla.../InRelease: Signature by key 0AB215679C571D1C8325275B9BDB3D89CE49EC21 uses weak algorithm (rsa1024)