When server is closing config file cant be closed leading to a NullPointer

[GeneralMine]

Describe the bug

When stopping a server in the config unloading phase a Nullpointer gets thrown.

To Reproduce

1. Start server with the mod
2. Stop server
3. Check debug output

Expected behavior

No response

Mod Version

1.9.3

Minecraft Version

1.20.1

Modloader

Forge

Crash Log (if applicable)

No response

Additional context

No response