Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
My domain is:www.shichuilab.com
I ran this command:acme.sh --issue www.shichuilab.com -w /home/wwwroot/www.shichuilab.com --reloadcmd “/etc/init.d/nginx reload”
It produced this output:DNS problem: SERVFAIL looking up CAA for shichuilab.com
My web server is (include version):Nginx 1.13.8
The operating system my web server runs on is (include version):Ubuntu 16.04.3 LTS (GNU/Linux 4.15.2-041502-generic x86_64)
My hosting provider, if applicable, is:https://www.alibabacloud.com
I can login to a root shell on my machine (yes or no, or I don’t know):yes
I’m using a control panel to manage my site (no, or provide the name and version of the control panel):no