Testing making my own mod pack, Crashes sometimes and others don't

[RapidHost]

After further looking I had a mod called Binnie's Mods, Could this be the issue, I removed Binnie's Mods and forestry, I seen a lot of people crashing due to Binnie's Mods when googling it, Let me know. Thank you

 

[Azzanine]

Does your pack run in single player? Or does it exhibit the same behavior?
the "Caused by: java.lang.IllegalStateException: failed to create a child event loop" seems to be caused by antivirus software just stopping Minecraft from running. Also there was talk of Firewalls doing the same thing but I don't think firewalls are capable of that.

At least that's what seems to be the consensus I found on Google.

 

[epidemia78]

One of the logs says you have a biome ID conflict with Twilight forest. But I dont think that is causing your crashes, in my experience it just causes mixed up terrain but you will definitely want to fix it (the erebus is probably the biomes getting overwritten.) The crashes seem to have something to do with a mob. Try removing all mods that add new mobs to the overworld. Personally, I had nothing but trouble with special mobs. Certain creatures cause the game to crash and you have to disable them in the config or just not use the mod at all.