Hi,
In order to avoid the warning and notifications, please change the yaml.load function to the yaml.safe_load one:
cp -p /usr/share/imunify360-webshield/webshield-watchdog{,.backup}
sed -i 's/yaml.load/yaml.safe_load/g' /usr/share/imunify360-webshield/webshield-watchdog
After that, make sure the issue no longer occurs:
/usr/share/imunify360-webshield/webshield-watchdog