Version Info

• Minecraft, 1.12.2
• Moving Elevators, Moving Elevators 1.4.3 for Forge 1.12

Are you using OptiFine?: ...
YES

Crash report (~/logs/latest.log)
...https://mclo.gs/D8bVh8E

Caused by Phosphor. Phosphor has been abandoned on Forge for years now and its source code is no longer available. Nothing I can do about it, just don't use Phosphor.