Ошибка с Let’s Encrypt на Nginx на DigitalOcean

Ошибка в консоли
nginx: [emerg] BIO_new_file(«/etc/ssl/certs/dhparam.pem») failed (SSL: error:02001002:system library:fopen:No such file or directory:fopen(‘/etc/ssl/certs/dhparam.pem’,’r’) error:2006D080:BIO routines:BIO_new_file:no such file)
nginx: configuration file /etc/nginx/nginx.conf test failed

Решение
sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048