Issue Description: *Hi! I am trying to setup dynmap using s3 static hosting. I followed the guide here: #2609
*

• Dynmap Version: beta 3a-409
• Server Version: paper 1.16.2 161
• Pastebin of Configuration.txt: https://pastebin.com/Xwn3SAKa
• Server Host (if applicable): HumbleServer, aws S3
• Pastebin of crashlogs or other relevant logs: None
• Other Relevant Data/Screenshots:
  Uncaught TypeError: Cannot read property 'error' of null
  at map.js?=3.1-beta3a-409:29
  at success (jquery.json.js?=3.1-beta3a-409:82)
  at Object.obj.success (jquery.json.js?=3.1-beta3a-409:19)
  at fire (jquery-1.11.0.js?=3.1-beta3a-409:3099)
  at Object.fireWith [as resolveWith] (jquery-1.11.0.js?=3.1-beta3a-409:3211)
  at done (jquery-1.11.0.js?=3.1-beta3a-409:9310)
  at XMLHttpRequest.callback (jquery-1.11.0.js?_=3.1-beta3a-409:9720)
• Steps to Replicate: setup everything in configuration.txt, reload server, copy web folder to s3, setup static hosting, try to load page, encounter error.

[X] I have looked at all other issues and this is not a duplicate
it is very similar to a closed issue, and I am not sure it qualifies as the same since I am using amazon s3
[X] I have been able to replicate this

closing due to age

I am also having this issue on my local and on a dedicated host with Nginx, PHP-fpm, and required dependencies.

in the interest of providing more information:
server: http://18.216.86.164/dynmap/index.html

server {
        listen 80 default_server;
        listen [::]:80 default_server;
        root /var/www/html;
        server_name REDACTED;

        location / {
                index index.html index.php;
                try_files $uri $uri/ /index.php?q=$uri&args =404;
        }

        location ~ [^/]\.php(/|$) {
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/run/php/php7.4-fpm.sock;
                include fastcgi.conf;
        }

        location ~ /\.ht {
                deny all;
        }
}

try_files $fastcgi_script_name =404;

# default fastcgi_params
include fastcgi_params;

# fastcgi settings
fastcgi_index                   index.php;
fastcgi_buffers                 8 16k;
fastcgi_buffer_size             32k;
fastcgi_hide_header             X-Powered-By;
fastcgi_hide_header             X-CF-Powered-By;