FGT and K8S interworking problem

Hi

The following error occurs when interworking between k8s and FGT.

What should I check?

Thank you.

FGT Version : 6.4

<FGT Debug>

kubed sdn connector kuber start updating
kube url: https://192.168.10.10:6443/api/v1/services
kube host: 192.168.10.10:6443:192.168.10.10
kubed curl error:35
kubed curl retry
kubed curl error:35
kubed curl retry
kubed curl error:35
kubed curl retry
kubed curl error:35

kubed failed to list kubernetes services.
kubed failed to get IPs from kubedrnetes services.
kubed failed to get ip addr list
kubed reap child pid: 9571
kubed sdn connector kuber prepare to update
getting token
kubed sdn connector kuber start updating
kube url: https://192.168.10.10:6443/api/v1/services
kube host: 192.168.10.10:6443:192.168.10.10
kubed curl error:35
kubed curl retry
kubed curl error:35
kubed curl retry
kubed curl error:35
kubed curl retry
kubed curl error:35