Seems as if Phosphor (2.0.15)is incompatible with DavincisVessels

• The version of the mod you are using: 6.340
• Your Minecraft version: 1.12.2
• Your Forge version: 14.23.5.2847
• The crash report or log: https://pastebin.com/PWLWNbNw

Not sure how it's possible, seeing as Phosphor just makes changes to Minecraft's lighting engine, but somehow I can second this problem. Here's my crash report. Very similar. I'm running Minecraft 1.12.2 with Forge 14.23.5.2838, DavincisVessels v6.340-full, Moving World 6.342-full, and I don't know where bryinabrt got Phosphor v2.0.15, but I'm running Phosphor v0.2.6-build50, which is the latest available from their Curseforge for Minecraft 1.12.2.

Use https://www.curseforge.com/minecraft/mc-mods/mixinbootstrap along with it and that should fix it.