I cannot obtain ssl certificate on my nginx web server

None.

If you want to continue, then...
Show these:
traceroute -m 5 -T -p 443 172.65.32.0
traceroute -m 5 -T -p 443 172.65.0.0
traceroute -m 5 -T -p 443 172.0.0.0

and for comparison:
traceroute -m 5 -T -p 443 cnn.com

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