我无法fail2ban在 Debian 12 服务器上启动。我收到以下错误：
2024-04-01 23:51:42,973 fail2ban [16176]: ERROR NOK: ("Failed to initialize any backend for Jail 'sshd'",)
2024-04-01 23:51:42,973 fail2ban.server [16176]: INFO Shutdown in progress...
2024-04-01 23:51:42,973 fail2ban.observer [16176]: INFO Observer stop ... try to end queue 5 seconds
2024-04-01 23:51:42,993 fail2ban.observer [16176]: INFO Observer stopped, 0 events remaining.
2024-04-01 23:51:43,033 fail2ban.server [16176]: INFO Stopping all jails
2024-04-01 23:51:43,034 fail2ban.database [16176]: INFO Connection to database closed.
2024-04-01 23:51:43,234 fail2ban.server [16176]: INFO Exiting Fail2ban
我知道日志sshd会记录到systemd，并且我已相应地配置了监狱sshd：
[sshd]
backend = systemd
enabled = true
port = ssh
logpath = %(sshd_log)s
maxretry = 3