There is an issue with the zabbix repository
ubuntu@ubuntu:~$ sudo apt update
Ign:1 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal InRelease
Err:2 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 178.128.6.101 443]
Hit:3 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease
Hit:5 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Hit:6 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Reading package lists... Done
E: The repository 'https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal 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.
ubuntu@ubuntu:~$ cd /etc/apt/
apt.conf.d/ auth.conf.d/ preferences.d/ sources.list.d/ trusted.gpg.d/
ubuntu@ubuntu:~$ cd /etc/apt/sources.list.d/
ubuntu@ubuntu:/etc/apt/sources.list.d$ ls
zabbix.list
ubuntu@ubuntu:/etc/apt/sources.list.d$ cat zabbix.list
deb https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal main
deb-src https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal main
ubuntu@ubuntu:/etc/apt/sources.list.d$ sudo apt update
Ign:1 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal InRelease
Err:2 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 178.128.6.101 443]
Hit:3 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease
Hit:5 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Hit:6 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Reading package lists... Done
E: The repository 'https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal 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.
ubuntu@ubuntu:/etc/apt/sources.list.d$
ubuntu@ubuntu:~$ sudo apt update
Ign:1 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal InRelease
Err:2 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 178.128.6.101 443]
Hit:3 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease
Hit:5 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Hit:6 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Reading package lists... Done
E: The repository 'https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal 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.
ubuntu@ubuntu:~$ cd /etc/apt/
apt.conf.d/ auth.conf.d/ preferences.d/ sources.list.d/ trusted.gpg.d/
ubuntu@ubuntu:~$ cd /etc/apt/sources.list.d/
ubuntu@ubuntu:/etc/apt/sources.list.d$ ls
zabbix.list
ubuntu@ubuntu:/etc/apt/sources.list.d$ cat zabbix.list
deb https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal main
deb-src https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal main
ubuntu@ubuntu:/etc/apt/sources.list.d$ sudo apt update
Ign:1 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal InRelease
Err:2 https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 178.128.6.101 443]
Hit:3 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease
Hit:5 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Hit:6 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Reading package lists... Done
E: The repository 'https://repo.zabbix.com/zabbix/5.4/ubuntu-arm64 focal 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.
ubuntu@ubuntu:/etc/apt/sources.list.d$
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