Thank you for your reply. I see the problem is caused by the private IP address, 192.168.0.55. How can this IP address be private, since anybody can reach my website napfeny.xyz via http protocol?
The thing is that I am building my own server at home, using the static IP address provided by my internet service company (Rogers Canada). Once my server is running fine, then I will take it to a data center, but I want to finish everything at home first, it is much easier.
In your opinion using the static IP address provided by my internet service company, I can not get ssl certificate from letsencrypt?
Thanks