Jan 20 03:14:17 plesk125 lfd[15936]: CC: Extracting zone from GeoLite CSV Country/ASN database for [AS2635]
Jan 20 03:14:17 plesk125 lfd[15936]: CC: Repopulating ipset cc_as2635 with IP addresses from [AS2635]
Jan 20 03:14:17 plesk125 lfd[15936]: IPSET: loading set new_as2635 with 6 entries
Jan 20 03:14:17 plesk125 lfd[15936]: IPSET: switching set new_as2635 to cc_as2635
Jan 20 03:14:17 plesk125 lfd[15936]: *Error* IPSET: [ipset v6.11: Sets cannot be swapped: the second set does not exist]
CSF --status doesn't have any chains with the new ASN. And csf --grep <ip> shows that the IP address isn't blocked.
That error strongly suggests that you did not restart csf and then lfd in the correct order as it is csf that initially creates the second ipset set, that is exactly the error you get when this is done incorrectly.
You should find if you now restart csf and then lfd it will work.