网址应该没问题。不知道是不是巧合，在kubekey 4.0.4没有发布的时候能够正常使用，运行后返回如下结果：
Downloading kubekey v4.0.3 from https://kubekey.pek3b.qingstor.com/github.com/kubesphere/kubekey/releases/download/v4.0.3/kubekey-v4.0.3-linux-amd64.tar.gz …
Downloading kubekey web_installer v1.0.3 from https://kubekey.pek3b.qingstor.com/github.com/kubesphere/web-installer/releases/download/v1.0.3/web-installer.tgz …
Kubekey v4.0.3 Download Complete!
[root@VM-16-5-rockylinux ~]# ll
total 140568
drwxr-xr-x 4 root root 4096 Jan 21 10:48 dist
-rw-r–r– 1 root root 615 Jan 21 10:45 host_check.yaml
-rwxr-xr-x 1 root root 99013910 Jan 20 18:41 kk
-rw-r–r– 1 root root 41998255 Mar 14 16:39 kubekey-v4.0.3-linux-amd64.tar.gz
drwxr-xr-x 4 root root 4096 Jan 21 10:48 kubernetes
drwxr-xr-x 3 root root 4096 Jan 21 10:45 kubesphere
-rwxr-xr-x 1 root root 1059 Mar 14 16:41 package.sh
-rw-r–r– 1 root root 393 Jan 21 10:45 README.md
drwxr-xr-x 2 root root 4096 Jan 21 10:45 schema
-rw-r–r– 1 root root 2857382 Mar 14 16:41 web-installer.tgz
