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E: The repository 'http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu jammy 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 'http://ppa.launchpad.net/mc3man/xerus-media/ubuntu jammy 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 'http://ppa.launchpad.net/ubuntukylin-members/ukui/ubuntu impish 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 'http://ppa.launchpad.net/ubuntukylin-members/ukui3.0/ubuntu impish 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 'http://ppa.launchpad.net/vala-team/ppa/ubuntu jammy 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.
Thomas Ward
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lolzz
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    This is exactly answered by the linked duplicate - https://askubuntu.com/questions/866901/what-can-i-do-if-a-repository-ppa-does-not-have-a-release-file - basically Jammy is still in development so MOST PPAs will not have release files for Jammy. Also, Jammy is offtopic as it's currently in development. – Thomas Ward Nov 20 '21 at 17:31
  • i tried the solution there it isint working can u please help me – lolzz Nov 20 '21 at 17:40
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    your only solution is to remove the PPA entries. Jammy is still in development, and you can't 'fix' a PPA that doesn't have a release file for a release that has only been in development for 2 weeks so far. – Thomas Ward Nov 20 '21 at 17:46
  • Refer https://askubuntu.com/help/on-topic where you'll notice only supported releases of Ubuntu and flavors are on-topic for this site. For jammy jellyfish [22.04] questions you'll need to use a development support site such as IRC (#ubuntu-next) or Ubuntu Forums, or wait until after release for this site expected release date for Ubuntu 22.04 is 21 April 2022) when your question will be on-topic here. – guiverc Nov 20 '21 at 21:25

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