此错误与缺少一个包有关:ca-certificates。安装它。

在Ubuntu Linux(以及类似的发行版)中:

# apt-get install ca-certificates

通过Apt-Cyg在CygWin中

# apt-cyg install ca-certificates

在Arch Linux下(树莓派)

# pacman -S ca-certificates

文档告诉我们:

该包包含CA证书的PEM文件，允许基于SSL的应用程序检查SSL连接的真实性。

在Debian——压缩包ca-certificates的详细信息

视窗:-

证书从https://curl.se/docs/caextract.html下载 重命名cacert。Pem到curl-ca-bundle.crt 将文件添加到以下任何位置

查看详情https://curl.se/docs/sslcerts.html

另一个解决这个问题的方法是禁用证书验证:

echo insecure >> ~/.curlrc

似乎您的卷曲指向一个不存在的文件与CA证书或类似。

有关CA certs与curl的主要参考，请参见:https://curl.haxx.se/docs/sslcerts.html

从$ man curl:

--cert-type <type>
    (SSL) Tells curl what certificate type the provided  certificate
    is in. PEM, DER and ENG are recognized types.  If not specified,
    PEM is assumed.

    If this option is used several times, the last one will be used.

--cacert <CA certificate>
    (SSL) Tells curl to use the specified certificate file to verify
    the peer. The file may contain  multiple  CA  certificates.  The
    certificate(s)  must be in PEM format. Normally curl is built to
    use a default file for this, so this option is typically used to
    alter that default file.

把这个放到你的。bashrc中

# fix CURL certificates path
export CURL_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt

(见罗伯特的评论)