error code -1

[stupidratcreature1000]

The game crashed whilst initializing game
Error: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/EntityRenderer

version : 1.12.2

Other mods used :

Additional Structures

AI Improvements

AutoRegLib

Better Foliage

BetterFps

BetterPortals

Bloodmoon

BloodmoonCMSFix (BMCMSFix)

CoroUtil

CreativeCore

Custom Mob Spawner

Day Zombies

Doomlike Dungeons

Durability Mod

Dynamic Surroundings

Dynamic Trees

Dynamic Trees - Biomes O' Plenty

Familiar Fauna

iChunUtil

Just Enough Items (JEI)

Lost Souls

Macaw's Bridges

MixinBootstrap

Mob Dismemberment

Mouse Tweaks

OreLib

Quark

Roguelike Dungeons -- Fnar's Edition

Scape and Run: Parasites

Shadowfacts' Forgelin

Spartan Shields

Spartan Weaponry

SwingThroughGrass

The Lost Cities

Wolf Armor and Storage Legacy

Zombie Awareness

[WolfBV]

Disable mods until it stops happening, then test with only Better Portals and the mod that seems to be causing your issue.

[This-1s-My-Name]

I had this issue a while back and Dynamic Surroundings was the issue.
I have no idea why, I'm not versed in java, but they conflict for some reason.

[Skorepion]

ShadowMC caused it for me

[MadBattler24]

So, any library mod can make this one not work? That's not cool (also seems to not work with any mod that changes visuals/noise because the portals mod uses vanilla aspects that break whenever other mods use it, but I don't know anything about java so I have no clue what I'm talking about)