hi thank you so much for your suggestions but I’m receiving the following error in /var/log/fail2ban.log about the missing of host group. Any syggestions? many thanks

2019-07-24 09:57:42,943 fail2ban.filter [937]: ERROR No ‘host’ group in ‘^(?:\[\])?\s*(?:\s+)?(?:\S+\s+)?(?:kernel: \[ *\d+\.\d+\]\s+)?(?:@vserver_\S+\s+)?(?:(?:(?:\[\d+\])?:\s+[\[\(]
?wp(?:\(\S+\))?[\]\)]?:?|[\[\(]?wp(?:\(\S+\))?[\]\)]?:?(?:\[\d+\])?:?)\s+)?(?:\[ID \d+ \S+\]\s+)? comment for post.* from host= marked as spam$’
2019-07-24 09:57:42,943 fail2ban.transmitter [937]: WARNING Command [‘set’, ‘antispambee’, ‘addfailregex’, ‘^(?:\\[\\])?\\s*(?:\\s+)?(?:\\S+\\s+)?(?:kernel: \\[ *\\d+\\.\\d+\\]\\s+)?(?:@vserver_\\S+\\s+)?(?:(?:(?:\\[\\d$
[\\[\\(]?wp(?:\\(\\S+\\))?[\\]\\)]?:?(?:\\[\\d+\\])?:?)\\s+)?(?:\\[ID \\d+ \\S+\\]\\s+)? comment for post.* from host= marked as spam$'”,)