[Solved] Odoo with Let's Encrypt and Nginx reverse proxy

Finally I solved my issue, I had to add ~* to the block:

location ~* / {
        proxy_pass http://127.0.0.1:8069;
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;

    proxy_redirect      off;
    proxy_buffering off;
    proxy_set_header    Host            $host;
    proxy_set_header    X-Real-IP       $remote_addr;
    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header    X-Forwarded-Proto https;
}