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

iRedMail 0.9.9/ Ubuntu 18.04.3 LTS / MySql / Nginx / iRedAdmin standard.

After running "sudo apt update && sudo apt upgrade" on the server, all emails account working fine from outlook client or web.
But when I tried SOGo web interface URL: https://mail.appout.co/SOGo I only got white page.

Kindly advice.