==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):  1.8.0 MARIADB edition.
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: Rocky 8.10
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mariadb
- 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.
====
I have made mistakes while upgrading iredmail to 1.8.0
Everything seems OK now, except accessing roundcube gives to message: Oops... something went wrong!

My initial mistake was that I missed the instruction to upgrade php from v8.0 to v8.2, and I tried v8.5 (which is not compatible).  After I got that sorted out (installed php v8.2), I don't see any relevant error message in any log, but the problem continues.

If I replace the roundcube index.php with a test .php file, that is served correctly, so nginx and php-fpm are working, and mariadb is running.

Can you give some hints as to where to look, or how to enable more logging?