Issue Description: In my modpack server I just added a dynmap but it show only white web site.

• Dynmap Version: Dynmap-3.6-forge-1.19.2
• Server Version: Forge - 43.3.2
• Pastebin of Configuration.txt: https://pastebin.com/fzJ0Gngb
• Server Host (if applicable): Google Cloud Platform
• Pastebin of crashlogs or other relevant logs: no any crashes
• Other Relevant Data/Screenshots: *I just changed a ip address from configuration.txt and touched nothing, I guess. The modpack got 'Dynmap for Minecolonies' mod. I don't know it would helpful. but here's my web for dynmap. - http://mcslaves.kro.kr:8123/ - It shows only a white screen. *
• Steps to Replicate: Install a 'Trains between Colonies' modpack from curseforge and set a server on Google Cloud Platform. open port 8123, and get in to the ip:8123. well. that doesn't work to me. or it just can be a problem with linux... I'm not that familliar with it..

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

no never mind. i just deleted it from server.