openSUSE-HW:/home/hillwood # ddclient
FATAL:    Error loading the Perl module JSON::Any needed for cloudflare update.

It's my config:
# /etc/ddclient.conf
daemon=300                              # check every 300 seconds
syslog=yes                              # log update msgs to syslog
#mail=root                              # mail all msgs to root
mail-failure=root               # mail failed update msgs to root
pid=/run/ddclient/ddclient.pid          # record PID in file.
ssl=yes
protocol=cloudflare
ttl=1
# use=web
# web=checkip.dyndns.org
usev6=if, if=br0
login=email
password=API Key
zone=hillwoodhome.net
cloud.home.hillwoodhome.net

ddclient 3.10.0 works fine with this config. We should provide an update for Leap.