Issue Description: Dynmap sample issue description. This description would include as much and as little detail necessary for us to understand the issue in its entirety.

• Dynmap Version: dynmap-version
• Server Version: Fabric 1.21.6
• Pastebin of Configuration.txt: https://pastebin.com/iHmutHYi
• Server Host (if applicable): Self hosting
• Pastebin of crashlogs or other relevant logs: No relevant logs.
• Other Relevant Data/Screenshots: No relevant data/screenshots.
• Steps to Replicate: Hello. I'm trying to set up DynMap to use an external web server using this guide, but I'm encountering some issues. I've set up Nginx and PHP successfully (using the root of the dynmap web server as the directory of dynmap/web in the Minecraft server), but I'm getting a black screen with the UI loaded in, a big red error saying Could not update map: Not Found and the console full of similar errors:
  GET http://jarvis.squirrel-sirius.ts.net:81/standalone/update.php?world=world&ts=1761650040297 404 (Not Found)
  I'm kinda losing my mind since im stuck at this for 5+ hours trying to get this to work :)
• Thanks *

[ x ] I have looked at all other issues and this is not a duplicate
[ x ] I have been able to replicate this