大神们,spacemacs安装包提示错误怎么解决?

Failed to verify signature queue-0.2.el.sig: No public key for 066DAFCB81E42C40 created at 2019-09-22T01:54:25+0800 using RSA

Command output: gpg: Signature made Sun 22 Sep 2019 01:54:25 AM CST using RSA key ID 81E42C40 gpg: Can’t check signature: No public key

Ubuntu的系统