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I may be posting too much, so I tried looking for solutions on Reddit. No one was replying, so I posted here.

[java.lang.NoClassDefFoundError: realdrops/entities/EntityItemLoot]

Crash logs

Logs

There's a possible fix I found, but I'm pretty sure that's it's own error.

Vanilla Tweaks adds enhanced mob drops, but removing that did no effect.

[java.lang.IllegalStateException: The fluid registry is corrupted]

Crash logs

Logs

I'm also having trouble with Waila, because before that it kept saying that the fluid registry is corrupted.

No idea what's causing Hwyla to break.

java.lang.NoClassDefFoundError: realdrops/entities/EntityItemLoot

One of your mods require the mod Realistic Item Drops

Add this mod:
https://www.curseforge.com/minecraft/mc-mods/realistic-item-drops

java.lang.IllegalStateException: The fluid registry is corrupted

Test it without immersivepetroleum

Quote from TileEntity»

Test it without immersivepetroleum

Any alternatives?

Try other builds

Or check for other mods, adding fluids.

Maybe it refers to the Crude Oil - Thermal Expansion adds this one, too

Check the config of both mods - maybe there is a way to disable fluids

Now i'm getting this.

It is an issue with mysticallib

Also try other builds

JAOPCD crashing. [net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from WrapUp (wrapup)]

Logs

Test it without Embers

[net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Redstone Flux (redstoneflux)]

Redstone Flux crashes now.

Is Redstone Flux even important? Because now that FE exists, should I remove CoFH Core? Plus, certain mods in the modpack uses CoFH Core and RF.

Logs

Just start with removing redstoneflux

CoFH Core is often required by other mods

From the looks of it, Brandon's Core requires Redstone Flux.

Test it with other builds of it:

https://www.curseforge.com/minecraft/mc-mods/redstone-flux/files