[BUG] [WARN] java.io.FileNotFoundException when players joined the server

[d3adwolf]

Describe the bug
There is a warning in the logs, but plugin seem to work fine.

To Reproduce
Steps to reproduce the behavior:

1. Start server core pufferfish.jar
2. Check logs
3. Pastebin

Server Information (please complete the following information):

• Server OS: LXC Ubuntu 23.04 on Proxmox VE 8.0.4
• Server Software: Pufferfish with Velocity Proxy
• Server Version: 1.20.2
• Plugin Version: 3.18.1

Information Command Output

[11:41:56 INFO]: Server information:
[11:41:56 INFO]: SuperAuth Version: 3.18.1
[11:41:56 INFO]: Server Version: git-Pufferfish-28 (MC: 1.20.2)
[11:41:56 INFO]: NMS Version: v1_20_R2
[11:41:56 INFO]: OS: Linux
[11:41:56 INFO]: RAM: 3072Mb
[11:41:56 INFO]: Players: 0
[11:41:56 INFO]: Is Bungee: false
[11:41:56 INFO]: Last Errors: 0
[11:41:56 INFO]: [SuperAuth]: Testing connection with MySQL DataBase...
[11:41:56 INFO]: [SuperAuth]: Test Passed!

Additional context
git-Pufferfish-29 (MC: 1.20.2) (Implementing API version 1.20.2-R0.1-SNAPSHOT) (Git: 0ba7617 on HEAD)