Ullimunatu

This is understandable, but why did this error appear in the first place? and what does this file do? Because after publishing the ticket, I deleted this file (I’m not good at the server? system? part of Minecraft and it took me 30 minutes to figure out the error) and was able to play, played for 6 hours, and now, a day later, I launch it again and I got this error again and it was fixed she deleted this file. don't know what could be?

As I understand it, the error lies in the forge-server.toml file, what can it be and how to fix it? In general, there were no manipulations with the server files, but for some reason the error came out..