Whenever iChunUtil begins initializing on the loading screen, everything locks up. The hammer stops moving, the progress bar progresses no further, then it just closes out. Then the Minecraft Launcher says that it crashed unexpectedly. Btw, if it helps, the mod I'm trying to use with it is G.L.A.S.S.
Thanks!

Also, would the game break if I installed more than one version of iCU?

Woah, someone actually posted a crash log! Anyways @xampie your crash is caused by Chiseled Me ASM cause of a coremod failing, bring this over to their devs.

To the others: for future reference, it would help if a crash log was attached. Posting "my game crashed" isn't very helpful in identifying the cause

i am having the same problem but i have about 74 mods installd but i don't think that's the issue.
i have incleuded the crash report and log aswel.
please fix this isseu i would really appreciate it!

latest.log

crash-2020-07-06_21.29.27-client.txt

i have the same problem! java just crashes and it happens everytime.