Update to KiCad Version 9 Not Working

I tried the following:
larry@larry-MS-7693:~$ sudo apt update && sudo apt install --upgrade kicad
Hit:1 Index of /ubuntu jammy InRelease
Hit:2 Index of linux/ubuntu/ jammy InRelease
Get:3 Index of /ubuntu jammy-updates InRelease [128 kB]
Hit:4 https://dl.google.com/linux/chrome/deb stable InRelease
Get:5 https://packages.mozilla.org/apt mozilla InRelease [1,526 B]
Get:6 Index of /ubuntu jammy-security InRelease [129 kB]
Get:7 Index of /ubuntu jammy-backports InRelease [127 kB]
Hit:8 Index of /kicad/kicad-8.0-releases/ubuntu jammy InRelease
Get:9 https://packages.mozilla.org/apt mozilla/main amd64 Packages [105 kB]
Hit:10 Index of /kicad/kicad-9.0-releases/ubuntu jammy InRelease
Get:11 Index of /ubuntu jammy-updates/main amd64 DEP-11 Metadata [103 kB]
Get:12 Index of /ubuntu focal-security InRelease [128 kB]
Hit:13 Index of /ondrej/apache2/ubuntu jammy InRelease
Hit:14 Index of /ondrej/php/ubuntu jammy InRelease
Get:15 https://packages.mozilla.org/apt mozilla/main i386 Packages [103 kB]
Get:16 Index of /ubuntu jammy-updates/restricted amd64 DEP-11 Metadata [212 B]
Err:17 https://packages.mozilla.org/apt mozilla/main all Packages
400 Bad Request [IP: 34.160.78.70 443]
Get:18 Index of /ubuntu jammy-updates/universe amd64 DEP-11 Metadata [359 kB]
Get:19 Index of /ubuntu jammy-security/main amd64 DEP-11 Metadata [43.2 kB]
Get:20 Index of /ubuntu jammy-security/restricted amd64 DEP-11 Metadata [208 B]
Get:21 Index of /ubuntu jammy-security/universe amd64 DEP-11 Metadata [126 kB]
Get:22 Index of /ubuntu jammy-security/multiverse amd64 DEP-11 Metadata [208 B]
Get:23 Index of /ubuntu focal-security/main amd64 DEP-11 Metadata [65.3 kB]
Get:24 Index of /ubuntu jammy-updates/multiverse amd64 DEP-11 Metadata [940 B]
Get:25 Index of /ubuntu jammy-backports/main amd64 DEP-11 Metadata [7,016 B]
Get:26 Index of /ubuntu jammy-backports/restricted amd64 DEP-11 Metadata [212 B]
Get:27 Index of /ubuntu jammy-backports/universe amd64 DEP-11 Metadata [17.9 kB]
Get:28 Index of /ubuntu jammy-backports/multiverse amd64 DEP-11 Metadata [212 B]
Fetched 1,442 kB in 3s (493 kB/s)
Reading package lists… Done
E: Failed to fetch https://packages.mozilla.org/apt/dists/mozilla/main/binary-all/Packages 400 Bad Request [IP: 34.160.78.70 443]
E: Some index files failed to download. They have been ignored, or old ones used instead.
larry@larry-MS-7693:~$
What is the problem? I also tried “sudo add-apt-repository ppa:kicad/kicad-9.0-releases”, followed by “sudo apt update”, then “sudo apt install kicad” and that didn’t work either!
I am running Ubuntu 22.04 on a desktop computer.
–Regards, Larry