Quarantine List Empty

[jeffjohnson11]

Impacted versions

Modoboa: 1.17.0
Amavis Frontend: 1.3.1
Installer used: No
Webserver: Apache
Database: MySQL 8.0.25
Browser used: Chrome/91.0.4472.166 (browser independent, happens on all browsers)

Steps to reproduce

Follow the steps at https://github.com/modoboa/modoboa-amavis/blob/master/docs/setup.rst and connect Amavis to MySQL.
Then:

• receive some spam emails
• or:
• enable $clean_quarantine_method = 'sql:'; in /etc/amavisd/amavisd.conf and receive some normal messages
  (the error persists, no matter if you save clean messages or not).

Navigate to quarantine page.

Current behavior

I can confirm that emails are being saved in binary (?) to quarantine table. However, quarantine page does not list any messages. No error messages or anything similar is appearing in httpd or mysqld error log.

Expected behavior

Quarantine page should show messages.