==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.7.1
- Deployed with iRedMail Easy or the downloadable installer? download
- Linux/BSD distribution name and version: Ubuntu 24.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx):nginx
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
I have established an iRedMail server on a cloud host while I dealt with some hardware issues.  They are now resolved and I want to bring the server onto my own machine.  Both the cloud and the physical server are running the same version of Ubuntu and iRedMail.  With the same passwords, to make life a bit easier.

I followed the docs.iredmail.org/backup.restore.html tutorial, brought the backup file onto my machine and inserted the 5 files (amavisd, iredapd, vmail, iredadmin, roundcubemail) into the local instance.  I can see from the admin panel that the users have messages in their accounts, but the users only get empty folders when they log into their Roundcube log-in page.

How can I fix this?