==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):
1.6.3
- Deployed with iRedMail Easy or the downloadable installer?
downloadable installer
- Linux/BSD distribution name and version:
Ubuntu Server 22.04
- 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.
====

Good day,
I created a folder named "test" and selected the "Shared access" option. In the window, I chose "Any authenticated user" and the options "View this folder, Read emails in this folder, Flag messages in the folder."
When I click on save, a window pops up saying, "Warning! An error has occurred, please try again later."
If I set similar parameters for only one user, no errors occur.
Can you suggest where to look and what to do?