Failban startet nicht , nextcloud diepi

Ich habe versucht failban mit Nextcloud zu installieren.
Nur wenn ich action auskommentiere funktioniert es
[nextcloud]
enabled = true
port = 80,443
protocol = tcp
filter = nextcloud
maxretry = 3
logpath = /var/log/nextcloud.log
#action = %(action_mwl)s

fail2ban-client status

Status

|- Number of jail: 3
`- Jail list: dropbear, nextcloud, sshd

Wenn nicht laufe ich auf diesen Fehler

root@DietPi:~# systemctl status fail2ban.service

● fail2ban.service - Fail2Ban Service
Loaded: loaded (/lib/systemd/system/fail2ban.service; enabled; vendor preset:
enabled)
Active: failed (Result: exit-code) since Wed 2020-11-04 13:19:46 C
ET; 22s ago
Docs: man:fail2ban(1)
Process: 4587 ExecStartPre=/bin/mkdir -p /var/run/fail2ban (code=exited, statu
s=0/SUCCESS)
Process: 4588 ExecStart=/usr/bin/fail2ban-server -xf start (code=exite
d, status=255/EXCEPTION)
Main PID: 4588 (code=exited, status=255/EXCEPTION)

Nov 04 13:19:46 DietPi systemd[1]: Starting Fail2Ban Service…
Nov 04 13:19:46 DietPi systemd[1]: Started Fail2Ban Service.
Nov 04 13:19:46 DietPi fail2ban-server[4588]: Failed during configuration: Bad
value substitution: option ‘action’ in section ‘nextcloud’ contains an interpola
tion key ‘action_mw1’ which is not a valid option name. Raw value: ‘%(action_mwl
)s’
Nov 04 13:19:46 DietPi fail2ban-server[4588]: Async configuration of server fai
led
Nov 04 13:19:46 DietPi systemd[1]: fail2ban.service: Mai
n process exited, code=exited, status=255/EXCEPTION
Nov 04 13:19:46 DietPi systemd[1]: fail2ban.service: Fai
led with result ‘exit-code’.