使用 gpg -c filename 加密文件时出错

Question

安装后gpg，当我尝试使用它加密文件时出现以下错误。

gpg -c test.sh

gpg: cancelled by user
gpg: error creating passphrase: Operation cancelled
gpg: symmetric encryption of `test.sh' failed: Operation cancelled

安装后是否缺少任何配置gpg？