https://imgur.com/rBLHWxo
I found the solution!
I realized that the .toml files were corrupted (it was empty when you open it) so I had to deleted it and restart the server.
Uhh, so I was tryna start my day by playing on my server but it just keeps on crashing and it says "Exception in server tick loop".
Here's the crash.log:
https://pastebin.com/iMcQXmXE