==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):   1.6.3
- Deployed with iRedMail Easy or the downloadable installer?  downloadable
- Linux/BSD distribution name and version:    Ubuntu 20.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx):   Nginx
- Manage mail accounts with iRedAdmin-Pro?  NO
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Trying a new fresh install with Ubuntu 20.04 LTS.

I receive this error, SOGO packages not available, and installation process closes.

Building dependency tree...
Reading state information...
E: Unable to locate package sogo-activesync
E: Unable to locate package sope4.9-gdl1-mysql
E: Couldn't find any package by glob 'sope4.9-gdl1-mysql'
E: Couldn't find any package by regex 'sope4.9-gdl1-mysql'

what can I do?
Thank you.