Plesk

360 Monitoring shows the error in Plesk: An unexpected error occurred

Symptoms

Cause

Outdated CA on the server.

Resolution

  1. Connect to the server via SSH

  2. Update certificate authority information:

    • Debian-based (Debian/Ubuntu):

      # update-ca-certificates

    • RHEL-based (RHEL/CentOS/AlmaLinux):

      # yum update ca-certificates