kubebench package install error

[pingsutw]

I follow this guide to install kubeflow on my single ubuntu18.04 machines, and I want to try kubebench but I got bellow error

root@kobe:~/kubeflow# kubectl version
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.0", GitCommit:"e8462b5b5dc2584fdcd18e6bcfe9f1e4d970a529", GitTreeState:"clean", BuildDate:"2019-06-19T16:40:16Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.0", GitCommit:"e8462b5b5dc2584fdcd18e6bcfe9f1e4d970a529", GitTreeState:"clean", BuildDate:"2019-06-19T16:32:14Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}

Below are the commands I ran

ks init kubeflow --namespace kubeflow
export KB_VERSION=master
export KB_ENV=default

curl https://raw.githubusercontent.com/kubeflow/kubebench/master/scripts/install_quickstarter.sh | bash

Error messgae

root@kobe:~/kubeflow# curl https://raw.githubusercontent.com/kubeflow/kubebench/master/scripts/install_quickstarter.sh | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   775  100   775    0     0   3934      0 --:--:-- --:--:-- --:--:--  3914
ERROR resolving package metadata: kubebench/kubebench-quickstarter@master: GET https://api.github.com/repos/kubeflow/kubebench/contents/kubebench/kubebench-quickstarter/parts.yaml?ref=bc682c1c9a7f5bd1281442965567764daecb0e68: 403 API rate limit exceeded for 140.116.247.211. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.) [rate reset in 24m45s] 
ERROR resolving package metadata: kubebench/kubebench-examples@master: GET https://api.github.com/repos/kubeflow/kubebench/commits/master: 403 API rate limit exceeded for 140.116.247.211. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.) [rate reset in 24m44s] 
ERROR no prototype names matched 'kubebench-quickstarter-service' 
ERROR no prototype names matched 'kubebench-quickstarter-volume' 
Error from server (NotFound): services "kubebench-nfs-svc" not found
ERROR unable to find component kubebench-quickstarter-volume 

[pingsutw]

After Downgrade Kubernetes version to 1.14.3, it works.
I think it's related to kubeflow/kubeflow#3544