Fail2ban服务无法启动的问题求助

我安装了Fail2ban但无法启动服务，每次尝试都会报错。

执行systemctl status fail2ban得到以下错误输出：

× fail2ban.service - Fail2Ban Service
Loaded: loaded (/lib/systemd/system/fail2ban.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2023-05-18 12:53:07 CEST; 21s ago
Docs: man:fail2ban(1)
Process: 18283 ExecStart=/usr/bin/fail2ban-server -xf start (code=exited, status=255/EXCEPTION)
Main PID: 18283 (code=exited, status=255/EXCEPTION)
CPU: 105ms

Mai 18 12:53:07 hochzeitsbilder systemd[1]: Started Fail2Ban Service.
Mai 18 12:53:07 hochzeitsbilder fail2ban-server[18283]: 2023-05-18 12:53:07,466 fail2ban             
Mai 18 12:53:07 hochzeitsbilder fail2ban-server[18283]: 2023-05-18 12:53:07,467 fail2ban             
Mai 18 12:53:07 hochzeitsbilder systemd[1]: fail2ban.service: Main process exited, code=exited, statu>
Mai 18 12:53:07 hochzeitsbilder systemd[1]: fail2ban.service: Failed with result 'exit-code'.
lines 1-13/13 (END)

我已经尝试了能找到的所有方法，但到目前为止都没有解决问题。

以下是Fail2ban的日志文件内容：

2023-05-18 08:47:24,422 fail2ban.server         [661]: INFO    --------------------------------------
2023-05-18 08:47:24,422 fail2ban.server         [661]: INFO    Starting Fail2ban v0.11.2
2023-05-18 08:47:24,423 fail2ban.observer       [661]: INFO    Observer start...
2023-05-18 08:47:24,445 fail2ban.database       [661]: INFO    Connected to fail2ban persistent datab
2023-05-18 08:47:24,451 fail2ban.database       [661]: WARNING New database created. Version '4'
2023-05-18 08:47:24,451 fail2ban.jail           [661]: INFO    Creating new jail 'sshd'
2023-05-18 08:47:24,510 fail2ban.jail           [661]: INFO    Jail 'sshd' uses pyinotify {}
2023-05-18 08:47:24,515 fail2ban.jail           [661]: INFO    Initiated 'pyinotify' backend
2023-05-18 08:47:24,517 fail2ban.filter         [661]: INFO      maxLines: 1
2023-05-18 08:47:24,550 fail2ban.filter         [661]: INFO      maxRetry: 5
2023-05-18 08:47:24,550 fail2ban.filter         [661]: INFO      findtime: 600
2023-05-18 08:47:24,551 fail2ban.actions        [661]: INFO      banTime: 600
2023-05-18 08:47:24,551 fail2ban.filter         [661]: INFO      encoding: UTF-8
2023-05-18 08:47:24,554 fail2ban.filter         [661]: INFO    Added logfile: '/var/log/auth.log' (po
2023-05-18 08:47:24,562 fail2ban.jail           [661]: INFO    Jail 'sshd' started
2023-05-18 09:25:53,280 fail2ban.server         [661]: INFO    Shutdown in progress...
2023-05-18 09:25:53,281 fail2ban.observer       [661]: INFO    Observer stop ... try to end queue 5 s
2023-05-18 09:25:53,301 fail2ban.observer       [661]: INFO    Observer stopped, 0 events remaining.
2023-05-18 09:25:53,341 fail2ban.server         [661]: INFO    Stopping all jails
2023-05-18 09:25:53,342 fail2ban.filter         [661]: INFO    Removed logfile: '/var/log/auth.log'
2023-05-18 09:25:53,543 fail2ban.actions        [661]: NOTICE  [sshd] Flush ticket(s) with iptables-m
2023-05-18 09:25:54,544 fail2ban.jail           [661]: INFO    Jail 'sshd' stopped
2023-05-18 09:25:54,545 fail2ban.database       [661]: INFO    Connection to database closed.
2023-05-18 09:25:54,545 fail2ban.server         [661]: INFO    Exiting Fail2ban

有人能帮我解决这个问题吗？

备注：内容来源于stack exchange，提问作者LogiX