Need help on NGINX proxy configuration

I've set up OC according to docs provided. All features works perfectly except one - https://cloud.naïve.io/ is not handled properly and displays 'file not found'. Any other pages (https://cloud.naïve.io/*) works.

OS: Ubuntu 16.04
Proxy Server: NGINX
PHP: v7.0
DB: MariaDB

NGINX config file configured according to provided example:

upstream php-handler {
    server unix:/run/php/php7.0-fpm.sock;
}

server {
    listen 80;
    server_name cloud.xn--nave-6pa.io;

    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name cloud.xn--nave-6pa.io;

    ssl_certificate #;
    ssl_certificate_key #;

    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
    add_header X-Content-Type-Options nosniff;
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header X-Download-Options noopen;
    add_header X-Permitted-Cross-Domain-Policies none;

    root /var/www/owncloud/;

    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }

    location = /.well-known/carddav {
        return 301 $scheme://$host/remote.php/dav;
    }

    location = /.well-known/caldav {
        return 301 $scheme://$host/remote.php/dav;
    }

    location /.well-known/acme-challenge { }

    fastcgi_buffers 64 4K;
    gzip off;

    error_page 403 /core/templates/403.php;
    error_page 404 /core/templates/404.php;

    location / {
        rewrite ^ /index.php$uri;
    }

    location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)/ {
        return 404;
    }

    location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) {
        return 404;
    }
    location ~ ^/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+|core/templates/40[34])\.php(?:$|/) {
        fastcgi_split_path_info ^(.+\.php)(/.*)$;
        include fastcgi_params;
        include snippets/fastcgi-php.conf;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        fastcgi_param HTTPS on;
        fastcgi_param modHeadersAvailable true;
        fastcgi_param front_controller_active true;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
        fastcgi_intercept_errors on;
        fastcgi_request_buffering off;
    }

    location ~ ^/(?:updater|ocs-provider)(?:$|/) {
        try_files $uri $uri/ =404;
        index index.php;
    }

    location ~* \.(?:css|js)$ {
        try_files $uri /index.php$uri$is_args$args;
        add_header Cache-Control "public, max-age=7200";
        #add_header Strict-Transport-Security "max-age=15552000; includeSubDomains";
        add_header X-Content-Type-Options nosniff;
        add_header X-Frame-Options "SAMEORIGIN";
        add_header X-XSS-Protection "1; mode=block";
        add_header X-Robots-Tag none;
        add_header X-Download-Options noopen;
        add_header X-Permitted-Cross-Domain-Policies none;
        access_log off;
    }

    location ~* \.(?:svg|gif|png|html|ttf|woff|ico|jpg|jpeg)$ {
        try_files $uri /index.php$uri$is_args$args;
        access_log off;
    }
}

Try to remove that one:

which is most likely messing around here. If you have any other custom stuff in your nginx config not listed at [1] then also remove those.

[1] https://doc.owncloud.org/server/latest/admin_manual/installation/nginx_examples.html

Worked like a charm. Thanks a lot!