❗ Checklist

• I am using the official english version of Slimefun and did not modify the jar.
• I am using an up to date "DEV" (not "RC") version of Slimefun.
• I am aware that issues related to Slimefun addons need to be reported on their bug trackers and not here.
• I searched for similar open issues and could not find an existing bug report on this.

📍 Description

I was looking at my server logs and found this interesting crash when Slimefun was auto-updating.
https://pastebin.com/cZtaUpmg

📑 Reproduction Steps

Autosave

💡 Expected Behavior

It to not crash.

📷 Screenshots / Videos

No response

📜 Server Log

https://pastebin.com/mKA74u4i

📂 /error-reports/ folder

N/A

💻 Server Software

Spigot

🎮 Minecraft Version

1.18.x

⭐ Slimefun version

Spigot 3446-Spigot-fb0dd5f-6e75502 (MC: 1.18.2)
Slimefun RC - 30 (git fd4b462)
Metrics-Module #28
Java 17

🧭 Other plugins

No response

Minecraft version 1.18.2 is not yet supported due to the changes to NMS between versions. A fix is in the works and I’m sure an announcement will come out when it is supported.

Nor do we support RC versions of Slimefun.
Update to the latest version of Slimefun first, if the issue persists, feel free to open a new bug report.

But as @Sefiraat stated the issue is due to the fact that MC 1.18.2 is not yet supported, a compatibility fix will be released in the coming hours or days.