Modpack version
0.4.8

Describe the bug
On singleplayer, I explore the world and get a crash; right now it happens nearly as soon as I log in.

Logs
https://pastebin.com/YFHLEFk0

Screenshots
N/A

Thanks for the report. This is a very rare issue caused by Supplementaries, manually updating it to the latest version should fix it :)

Yep, problem solved when I updated the Supplementaries version.