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Ubuntu 16.04LTS / Alibaba Cloud | NginX | Lets Encrypt installation

After standard installation of Perfect Server Ubuntu 16.04LTS, the LetsEncrypt fails to activate.
The error log has the following errors: Deserialization error: Wrong directory fields

Try re-install Lets Encrypt

https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04

sudo add-apt-repository ppa:certbot/certbot
sudo apt-get update
sudo apt-get install python-certbot-nginx

Then return to ISPConfig panel and try to activate again.

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