Issue Description: Error 500 when trying load page (http://217.106.107.176:30001).

• Dynmap Version: Dynmap version: core=3.1-beta4-421, plugin=3.1-beta4-421
• Server Version: Paper 1.12.2 build 1618
• Pastebin of Configuration.txt: https://pastebin.com/eFUEm2PQ
• Server Host (if applicable): https://bungee.host
• Pastebin of crashlogs or other relevant logs: nothing find

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

i used rcon port

Your port 30001 is closed.