http2 with nginx not working with Safari

Hello guys,

My https site cannot be displayed in Safari with “nsposixerrordomain:100” error. I’m running nginx 1.13.3 and Ubuntu 17.04. The site is displayed fine in other browsers and the SSL test also completes fine (A+). When I disable the http2 from server block, it displays fine in Safari.

Thanks for any useful info.

Config:

server {
listen 443 ssl http2 default_server;
listen [::]:443 ssl http2 default_server;
root /var/www/domain.com;
index index.php index.html index.htm;
server_name domain.com www.domain.com;
location / {
#try_files $uri $uri/ =404;
try_files $uri $uri/ /index.php$is_args$args;
}
ssl_certificate /etc/letsencrypt/live/domain.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/domain.com/privkey.pem; # managed by Certbot
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers EECDH+CHACHA20:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5;
ssl_ecdh_curve secp384r1;
ssl_stapling on;
ssl_stapling_verify on;
ssl_dhparam  /etc/nginx/ssl/dhparam.pem;
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 180m;
ssl_session_tickets off;
add_header Strict-Transport-Security "max-age=31536000;
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
http2_max_field_size 16k;
http2_max_header_size 32k;
http2_recv_buffer_size 32k;
#includeSubDomains" always;
location ~ \.php$ {
include snippets/fastcgi-php.conf;
fastcgi_pass unix:/run/php/php7.0-fpm.sock;
}
location ~ /\.ht {
deny all;
}
server {
listen         80;
listen    [::]:80;
server_name    domain.com www.domain.com;
return         301 https://$server_name$request_uri;
}