404 public folder behind Nginx reverse proxy subpath

Hi everyone.

Firstly, let me thank you your hard and awesome work with grafana. Also, excuse if this is a repetitive thread but I have been reading many threads on this forum and many guides over Internet but I can’t find a solution. I’m newbie with grafana, maybe it is my problem…

Following official Grafana Nginx reverse proxy guide I have configured my server block and grafana.ini with a subpath. When I browse to my grafana url, everytime I get this message:

If you're seeing this Grafana has failed to load its application files 

1. This could be caused by your reverse proxy settings.

2. If you host grafana under subpath make sure your grafana.ini root_url setting includes subpath

3. If you have a local dev build make sure you build frontend using: yarn start, yarn start:hot, or yarn build

4. Sometimes restarting grafana-server can help

My server block looks like:

server {
    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/antaresserver.dynu.net/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/antaresserver.dynu.net/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
    root /var/www/antaresserver/html;    
    index index.html index.htm index.nginx-debian.html;

    server_name antaresserver.dynu.net www.antaresserver.dynu.net;

    location / {
	 try_files $uri $uri/ =404;

    location /grafana/ {

server {
    if ($host = www.antaresserver.dynu.net) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    if ($host = antaresserver.dynu.net) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

        listen 80;
        listen [::]:80;

        server_name antaresserver.dynu.net www.antaresserver.dynu.net;
    return 404; # managed by Certbot

And grafana.ini;


;protocol = http

;http_addr = 

;http_port = 3000

;domain = antaresserver.dynu.net

;enforce_domain = false

;root_url = https://antaresserver.dynu.net/grafana/

Screenshot with response and network debug:

Plase, could you guide me what I’m doing wrong??

Thanks in advance.