Is this a modpack or mod issue?
this is a modpack issue, I think

PLEASE MENTION IF YOU ADDED ANY MODS.. ESPECIALLY SODIUM, IF YOU DON'T, IT MAKES US VERY GRUMPY
i did not

Modpack Version
2.8.1

Describe the bug
i made an ME system using the applied energistics 2 mod, as soon as i added a 4k storage cell into an ME chest, the game crashed. everytime i open the same world, the game crashes

To Reproduce
Steps to reproduce the behavior:

1. take a power source and connect it to an ME chest
2. take a 4k storage cell and put it into the chest
3. game crashes

Expected behavior
well i didn't think the game was gonna crash, and i thought that i was gonna be able to use it

Crash Log
https://paste.alloffabric.com/ubohozumib.yaml

I have this issue too, but I used 16k storage cell and chest even don't connected to power source. I just placed a chest, put cell into it and... BANG! "Hi, I'm Minecraft, and I'm a Crashaholic."

@Drexel20 you can launch your world as server, and use console command to destroy the chest. Crashlog contains chest coordinates. In your case it will be somthing like
setblock 111 71 -201 stone
Or
setblock 111 71 -201 diamond_block
If you need refund)
Storage cell will drop as item, so you can log-in and collect it.