Describe the bug you're experiencing

Related to this issue here: #1
After loading my singleplayer world it instantly crashes.

Reproducability

Install fastasyncworldsave-1.20.1-1.4.jar

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.20.1

Modloader version

Forge

Logs

https://gist.github.com/DeshiDesu/f29440c27473d4db59b73f0228a09ffc

you're running version 1.3 in that log, probably did not delete/update the version properly^^

My apologies... thanks for pointing that out for me.