on each restart mailnag loses passwords

[balditf]

Hi, I'm experiencing the following issue: on each machine restart, mailnag seems to loose passwords for all accounts. I'm running debian bookworm on a fresh install. I first ran mailnag-config in terminal to enter each password account, just after installing mailnag and gnome-shell-mailnag packages with apt. When rebooting, if I start mailnag-config, each mail account has a blank password field (so mail notification doesn't obviously work, and I have to enter passwords again ).
Could you please help me?
Thank's in advance for any valuable help.
F. Baldit