SSL issues and nginx config

nginx-ssl.conf

root@gateway:/usr/local/etc/nginx/sites-enabled # cat ../conf.d/ssl.conf
## Improves TTFB by using a smaller SSL buffer than the nginx default
ssl_buffer_size 8k;

resolver 8.8.8.8;
ssl_stapling_verify on;

ssl_session_timeout 30m;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
ssl_session_cache shared:SSL:10m;
ssl_dhparam /etc/ssl/dhparams.pem;
ssl_prefer_server_ciphers on;

root@gateway:/usr/local/etc/nginx/sites-enabled # cat perl.place
server {
        listen 443 ssl;
        server_name perl.place;

        ssl_certificate /mnt/ssl/nginx/perl.place/fullchain.pem;
        ssl_certificate_key /mnt/ssl/nginx/perl.place/privkey.pem;
        ssl_trusted_certificate /mnt/ssl/nginx/perl.place/chain.pem;

        location = / {
                proxy_pass http://127.0.0.1:81;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-Host $host;
                proxy_set_header X-Forwarded-Port $server_port;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Server-Select $scheme;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Url-Scheme: $scheme;
                proxy_set_header Host $host;
                proxy_http_version 1.1;
                proxy_cache off;
        }
}