I want to get a certificate for my panel, but I get the following error. I also set DNS and removed firewall restrictions.I use Hetzner server
Hi @saeid, and welcome to the LE community forum 
Please shows the output of:
traceroute -T -p 443 acme-v02.api.letsencrypt.org
hmm...
What shows?:
apt list | grep -i traceroute
And also just:
traceroute acme-v02.api.letsencrypt.org