Hello Nigel,
Thank you for reaching out! To fix this issue, please reinstall KernelCare by using the following steps:
rm -f /etc/cron.d/kcare-cron
yum reinstall -y kernelcare
If you have the servers with KernelCare version older than 2.27-1, then please use there:
rm -f /etc/cron.d/kcare-cron
yum update -y kernelcare
It should fix the issue. Let me know if you have any questions. Hope to hear from you soon.