Version Info

• Minecraft, 1.12
• Moving Elevators, movingelevators-1.2.34-mc1.12.jar

Steps to Reproduce
Log into a server with the mod have optifine installed

Crash report (~/logs/latest.log)
crash-2022-02-01_18.04.39-client.txt

Should be fixed now in Moving Elevators 1.3.0.

Thank you for reporting the issue!