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I am attempting to install the Zabbix monitoring software on an Ubuntu 20.04 server.

I am following the instructions here: https://www.zabbix.com/download?zabbix=6.0&os_distribution=ubuntu&os_version=20.04_focal&db=mysql&ws=apache

When I try to update, I get this error:

user@someserver:~$ sudo apt-get update
[sudo] password for user: 
Hit:1 http://archive.ubuntu.com/ubuntu focal InRelease                                               
Get:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]                      
Get:4 http://archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]                       
Get:5 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 c-n-f Metadata [14.7 kB]       
Get:6 http://archive.ubuntu.com/ubuntu focal-security/main amd64 c-n-f Metadata [9,564 B]            
Ign:7 https://repo.zabbix.com/zabbix/5.4/ubuntu focal InRelease                                      
Err:8 https://repo.zabbix.com/zabbix/5.4/ubuntu focal Release 
  Could not handshake: Error in the pull function. [IP: 178.128.6.101 443]
Reading package lists... Done
E: The repository 'https://repo.zabbix.com/zabbix/5.4/ubuntu 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.

This causes the whole installation to break, as I can pull some (most?) needed files and executables directly from the Ubuntu Focal repos, but there are a couple files Zabbix needs that seem to only be available from them.

Does anyone have some advice? Thanks.

slightly_toasted
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jmahood
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    The problem does not seem to be that the release file does not exist, but rather the `Could not handshake: Error in the pull function`. – Gerald Schneider Feb 16 '22 at 14:30
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    [similar](https://stackoverflow.com/questions/59625036/apt-error-on-ubuntu-18-04-could-not-handshake-error-in-the-pull-function) [questions](https://askubuntu.com/questions/1014973/apt-update-could-not-handshake-an-unexpected-tls-packet-was-received) indicate that this could be a proxy issue. – Gerald Schneider Feb 16 '22 at 14:34

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