获取证书失败。

[xiuxiang]

ERROR: pyopenssl 19.1.0 has requirement cryptography>=2.8, but you'll have cryptography 2.1.4 which is incompatible.
Installing collected packages: certbot, PyOpenSSL
Successfully installed PyOpenSSL-19.1.0 certbot-1.3.0
An unexpected error occurred:
pkg_resources.ContextualVersionConflict: (cryptography 2.1.4 (/usr/lib/python3/dist-packages), Requirement.parse('cryptography>=2.8'), {'PyOpenSSL'})
Please see the logfile '/tmp/tmpo17lt42m/log' for more details.
获取证书失败，请到 https://www.hijk.pw 反馈

[hijk]

@xiuxiang ubuntu系统？

[xiuxiang]

对的，但是已经换了centos，弄好了

[hijk]

嗯，ubuntu 16.04的依赖还是有点问题