When I install this mod, it's library(LLibrary), and Eleccore together, the game crashed while initializing.
When I only install LLibrary and Eleccore, the game does not crash.
There seems to be a bug existing in mod Eleccore, but I still post this here so that you might have a chance of finding out what's going wrong and fix it.
(It seems that the conflict happens when the mod Eleccore is trying to register to FML)
The mod ElecCore is at this link: https://github.com/Elecs-Mods/ElecCore

The attachments are the crash report and the latest log.
latest.log
crash-2018-09-14_05.28.49-client.txt

Thanks for the report! I checked out what ElecCore is doing, and it is at fault.

I've also sent an issue report to the ElecCore mod page, and I hope they will fix this weird thing.

The author of mod ElecCore does not reply to the issue...

The author of mod ElecCore still does not reply to the issue...

Pardon my delayed response, but yes it appears the owner hasn't been active for a bit. I'll try contacting them to get this issue resolved.

The problem no longer exists...
Thanks!