I'm playing on 1.20.1 with Forge 47.3.0.
I'm using Octolib 0.4.2 and Relics 0.8.0.7.

I tried playing with Relics installed, then Minecraft crashes when I load the game with an 'Exit Code: 1'
When Relics isn't installed, I'm able to play just fine, so I'm certain it's an incompatibility issue with something in my list.
I tried allocating 16000-22000 RAM, but both resulted in the same crash. (I have a total of 32000 RAM)

I didn't get a crash report, but I attached my latest log.
latest.log

you will need to post your launcher log
(how you get it depends on your launcher)

here is an example for vanilla launcher:
https://minecrafthopper.net/help/guides/getting-minecraft-game-output-log/

launcher_log.txt
I think this is it?

Looks like an incompatibility between octolib and mcpitanlib. Since it still didn't resolved, you need to choose which one mod you want to use.

Ok thank you for the help!~ :D