==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):     2020082501
- Deployed with iRedMail Easy or the downloadable installer? iRedMail Easy
- Linux/BSD distribution name and version: Ubuntu 18.04.5 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

After upgrading via iRedMail Easy today, SOGo returns "Bad Gateway".

Running service sogo restart doesn't help - What to do?

webmaster@mx:~$ sudo service sogo status
? sogo.service - LSB: SOGo server
   Loaded: loaded (/etc/init.d/sogo; generated)
  Drop-In: /etc/systemd/system/sogo.service.d
           +-override.conf
   Active: active (exited) since Wed 2020-08-26 14:42:05 CEST; 24min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 9763 ExecStop=/etc/init.d/sogo stop (code=exited, status=0/SUCCESS)
  Process: 9913 ExecStart=/etc/init.d/sogo start (code=exited, status=0/SUCCESS)

Aug 26 14:42:05 XXX systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
Aug 26 14:42:05 XXX systemd[1]: Starting LSB: SOGo server...
Aug 26 14:42:05 XXX sogo[9913]:  * Starting SOGo sogo
Aug 26 14:42:05 XXX sogo[9913]:    ...done.
Aug 26 14:42:05 XXX systemd[1]: Started LSB: SOGo server.