Attempting to update my functioning Vanilla 1.21.4 server with a few data packs to Spigot 1.21.4 using BuildTools, caused the server, when ran, to enter into an endless loop as shown in the attached .mp4

First time this ran I let it loop for 10 minutes before having to manually close the window as the "stop" command wasn't recognized. During this time I attempted to connect from my primary machine, but it would never ping the server and would never connect.

when the server starts these are the opening messages that appear to match some of the later warnings that loop endlessly.

attached is the end portion of the world map as created by spigot on first startup. This was requested by md_5

If any additional info is needed don't hesitate to message me on discord, m0sifer.