==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.4.0
- Deployed with iRedMail Easy or the downloadable installer? Downloadable installer
- Linux/BSD distribution name and version: DEBIAN 10 Buster
- 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.
====
During Installation of iRedMail-1.4.0 on a new installed DEBIAN 10 Linux I get get the followin error:

*************************************************************************
***************************** WARNING ***********************************
*************************************************************************
*                                                                       *
* Below file contains sensitive infomation (username/password), please  *
* do remember to *MOVE* it to a safe place after installation.          *
*                                                                       *
*   * /root/iRedMail-1.4.0/config
*                                                                       *
*************************************************************************
********************** Review your settings *****************************
*************************************************************************

* Storage base directory:               /var/vmail
* Mailboxes:
* Daily backup of SQL/LDAP databases:
* Store mail accounts in:               MariaDB
* Web server:                           Nginx
* First mail domain name:               xxserver.example.com
* Mail domain admin:                    postmaster@xxserver.example.com
* Additional components:                Roundcubemail SOGo netdata iRedAdmin Fail2ban

< Question > Continue? [y|N]y
[ INFO ] Add apt repo for SOGo: https://packages.inverse.ca
[ INFO ] Import apt key (0x810273C4) for SOGo repo (https://packages.inverse.ca).
E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
[ INFO ] Resynchronizing the package index files (apt update) ...
Hit:1 http://debian.intergenia.de/debian buster InRelease
Hit:2 http://debian.intergenia.de/debian buster-updates InRelease
Hit:3 http://debian.intergenia.de/debian-security buster/updates InRelease
Get:4 https://packages.inverse.ca/SOGo/nightly/5/debian buster InRelease [2513 B]
Err:4 https://packages.inverse.ca/SOGo/nightly/5/debian buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 19CDA6A9810273C4
Reading package lists... Done
W: GPG error: https://packages.inverse.ca/SOGo/nightly/5/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 19CDA6A9810273C4
E: The repository 'https://packages.inverse.ca/SOGo/nightly/5/debian buster InRelease' is not signed.
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.
[ INFO ] Installing package(s): python3-setuptools python3-pip python3-wheel python3-requests uwsgi uwsgi-plugin-python3 postfix postfix-pcre libsasl2-modules mariadb-client mariadb-server postfix-mysql libdbd-mysql-perl php-cli php-fpm php-json php-gd php-curl mcrypt php-intl php-xml php-mbstring php-zip php-mysql nginx-full dovecot-imapd dovecot-pop3d dovecot-lmtpd dovecot-managesieved dovecot-sieve dovecot-mysql amavisd-new libcrypt-openssl-rsa-perl libmail-dkim-perl clamav-freshclam clamav-daemon spamassassin altermime arj nomarch cpio lzop cabextract p7zip-full rpm libmail-spf-perl unrar-free pax lrzip mlmmj python3-pymysql memcached sogo sogo-activesync sope4.9-gdl1-mysql python3-sqlalchemy python3-dnspython python3-pymysql python3-jinja2 python3-netifaces python3-bcrypt python3-dnspython python3-simplejson python3-pymysql fail2ban geoip-bin geoip-database zlib1g libuuid1 libmnl0 curl lm-sensors netcat bzip2 acl patch cron tofrodos logwatch unzip bsdutils liblz4-tool nftables
Reading package lists...
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'
<< ERROR >> Installation failed, please check the terminal output.
<< ERROR >> If you're not sure what the problem is, try to get help in iRedMail
<< ERROR >> forum: https://forum.iredmail.org/