Err:6 https://packagecloud.io/slacktechnologies/slack/ubuntu jammy Release
404 Not Found [IP: 52.9.214.107 443]
Reading package lists... Done
E: The repository 'https://packagecloud.io/slacktechnologies/slack/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.
Responder1
Abrir Software & Updates
. Vá para outro software e remova o repositório relacionado ao Slack. Parece que eles ainda não suportam o Ubuntu 22.04 ou o repositório não existe.