Describe the bug
The world hangs on new creation. Can't be sure it's caused by your mod but it is listed in the latest.log file. I am using the most up-to-date versions of the mod and libraries.

To Reproduce
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4. See error

Expected behavior
A clear and concise description of what you expected to happen.

ModPack
Custom Modpack, Eternium Expert
latest.log

This happen in pretty standard code, could you try removing performances mods as they are known to break things.

Mainly modern fix as it adds the timeout itself (vanilla don't timeout, it waits.

I removed ModernFix and Lightspeed and tried again. I am currently sitting at 30 minutes waiting and only at 1% world loading. Here is my modlist if it helps.
modlist.txt
latest.log

Re-enabling ModernFix and Lightspeed, but downgrading Elemental Craft to 5.7.5 and DataPack Anvil to 4.3.2 allowed world creation to finish in about 12 minutes.

It may be caused by chipped: embeddedt/ModernFix#73

I came across this issue while trying to figure out why generating new chunks in my existing world (in my custom modpack) was causing everything to hang. I don't have ModernFix and Lightspeed in my pack but I do have Chipped (alongside Elementalcraft of course).

So I decided to do a little testing to see if Chipped was conflicting with Elementalcraft...but unfortunately it's not the problem. I made a small test pack with just these mods:

• dpanvil-1.19.2-4.4.0.jar
• elementalcraft-1.19.2-5.8.0.jar
• jei-1.19.2-forge-11.6.0.1015.jar
• Patchouli-1.19.2-77.jar

And the world creation keeps hanging. The latest one was been hanging at 54% for 15 minutes before I killed the task. Downgrading Elementalcraft and Datapack Anvil to the previous versions lets the world generate without issue. So it appears that the latest updates are the cause of the issue.

Edit: forgot to include the log:
2023-05-05-5.log

I managed to reproduce it in dev env and I think I found the cause.

Fixed in 5.8.1