Describe the bug
1.20.1 FORGE version of the mod not working and crash the game instantly

To Reproduce
Steps to reproduce the behavior:

1. Open curseforge, press AllTheMods9 modpack
2. Click on 'PLAY' tab inside minecraft launcher
3. the launcher try load the game
4. See error

Expected behavior
The game cannot be executed, press play and crash instantly

Screenshots
https://imgur.com/a/FdR5Plh

Versions
1.20.1

sounds like you have a problem with the modpack in general you will need to follow up on that on modpack discord or their github with more details. I would guess you may not have enough memory allocated, but that's just a guess as there's almost no info to use here.