Invalid link can not be picked up

[RainbowMango]

What happened:

Invalid link can not be picked up, https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/1.10/color/certified-kubernetes-1.10-color.png。

The output as follows:
[root]# liche -v design_v1.10.md
design_v1.10.md
...
OK https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/
OK https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/1.10/color/certified-kubernetes-1.10-color.png
ERRORhttps://API.AdvertiseAddress:API.BindPort
Strconv.Atoi: parsing "api.bindport": invalid syntax

The link is invalid, by curl:
[root]# curl https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/1.10/color/certified-kubernetes-1.10-color.png
404: Not Found

The link in markdown file as follows:
kubeadm init and kubeadm join together provides a nice
user experience for creating a best-practice but bare Kubernetes cluster from scratch.
However, it might not be obvious how kubeadm does that.