After a long break from hosting, I decided to host again. When I booted up the server, I was given this over and over.
https://gyazo.com/7229fec80a86f63356357ab9403089a5(As a last resort the image is attached)
After which I decided to clean install Blockland (excluding Blockland.exe and the DLL found in the folder), In both my Documents as well as Program Files (x86)
That didn't fix it.
On a related note, my router will not let me port forward port 28000 for TCP and UDP because it is supposedly "In use by another rule". That cannot be the case because I deleted all the other rules. This might have something to do with upgrading the router to a newer model.
Absolutely no idea what to do other than call my ISP and I was unable to find any information related to this issue anywhere else.