系统：centos
用安装指南里的命令 ./kk create cluster -f config-sample.yaml 创建 Kubernetes 集群，会报以下错误：
09:50:26 CST stdout: [node2]
ETCD_NAME=etcd-node2
09:50:26 CST success: [node2]
09:50:26 CST [CertsModule] Fetch etcd certs
09:50:26 CST message: [node2]
Fetch /etc/ssl/etcd/ssl/admin-node2-key.pem failed: illegal base64 data at input byte 3
09:50:26 CST retry: [node2]
09:50:31 CST message: [node2]
Fetch /etc/ssl/etcd/ssl/admin-node2-key.pem failed: illegal base64 data at input byte 3
09:50:31 CST retry: [node2]
09:50:36 CST message: [node2]
Fetch /etc/ssl/etcd/ssl/admin-node2-key.pem failed: illegal base64 data at input byte 3
09:50:36 CST failed: [node2]
error: Pipeline[CreateClusterPipeline] execute failed: Module[CertsModule] exec failed:
failed: [node2] [FetchETCDCerts] exec failed after 3 retries: Fetch /etc/ssl/etcd/ssl/admin-node2-key.pem failed: illegal base64 data at input byte 3
百度和deepseek说是证书文件格式不正确，但是我检查了证书没有问题啊。
请问应该怎么解决？