Issue (The better the description the better i can solve the issue):

I'm using a self-created modpack for fun with friends. However after a while working on creating a small village, or a tutorial area this error happens and I can never enter the map again, it's always like overnight or 2 or 3 days later. It's weird because it only happens on maps that I choose to specifically do that. On maps I used to summon mobs and items to see ID and etc. this problem does not happen, only on "serious" maps.

Steps to reproduce:

Try to assemble something for a few days and return to the save later. At some point it will crash. (creating something in the pocket dimension (Dimensional Doors) using items from thaumcraft, armor support and things from "Electroblob's Wizardry" and the cool Fancy Sign from bibliocraft seems to force the error to occur better).

Affected Versions (Latest is NOT a version):

• Minecraft: 1.12.2
• Forge: 1.12.2 - 14.23.5.2859
• Fabric(API): X
• TenshiLib: 1.12.2 - 1.2.4
• ImprovedMobs: 1.12.2 - 1.6.10

Other Mods (If you think it might be cause of an incompability. Adding a link + the used version will help greatly):

-tlskincape1.12.2-1.4 - (TL skin and cape) - - https://www.curseforge.com/minecraft/mc-mods/tl-skin-mod
-archaicguns-0.4.0 - - https://www.curseforge.com/minecraft/mc-mods/archaic-guns
-Baubles-1.12-1.5.2 - - https://www.curseforge.com/minecraft/mc-mods/baubles
-BiblioCraft[v2.4.5][MC1.12.2] - - https://www.curseforge.com/minecraft/mc-mods/bibliocraft
-Bloodmoon-MC1.12.2-1.5.3 - - https://www.curseforge.com/minecraft/mc-mods/bloodmoon
-Bookshelf-1.12.2-2.3.590 - - https://www.curseforge.com/minecraft/mc-mods/bookshelf
-coffeework-1.2.9 - - https://www.curseforge.com/minecraft/mc-mods/coffee-workshop
-CookingForBlockheads_1.12.2-6.5.0 - - https://www.curseforge.com/minecraft/mc-mods/cooking-for-blockheads
-crimsonrevelations-0.8 - - https://www.curseforge.com/minecraft/mc-mods/crimson-revelations
-DimensionalDoors-1.12.2-3.1.2-UNOFFICIAL - - https://www.curseforge.com/minecraft/mc-mods/dimensionaldoors
-ElectroblobsWizardry-4.3.4-MC1.12.2 - - https://www.curseforge.com/minecraft/mc-mods/electroblobs-wizardry
-foamfix-0.10.14-1.12.2 - - https://www.curseforge.com/minecraft/mc-mods/foamfix-optimization-mod
-forbidden_arcanus-1.12.2-1.1.4 - - https://www.curseforge.com/minecraft/mc-mods/forbidden-arcanus
-geckolib-forge-1.12.2-3.0.16 - - https://www.curseforge.com/minecraft/mc-mods/geckolib
-growthcraft-1.12.2-4.2.2.1 - - https://www.curseforge.com/minecraft/mc-mods/growthcraft-community-edition
-guns-0.15.3-1.12.2 (MrCrayfish's Gun Mod) - - https://www.curseforge.com/minecraft/mc-mods/mrcrayfishs-gun-mod
-HammerLib-1.12.2-2.0.6.31 - - https://www.curseforge.com/minecraft/mc-mods/hammer-lib
-horsestandstill-1.12.2-1.0.0 (Stupid Horse Stand Still) - - https://www.curseforge.com/minecraft/mc-mods/stupid-horse-stand-still
-Hwyla-1.8.26-B41_1.12.2 - - https://www.curseforge.com/minecraft/mc-mods/hwyla
-iceandfire-1.9.1-1.12.2 - - https://www.curseforge.com/minecraft/mc-mods/ice-and-fire-dragons
-ImprovableSkills-1.12.2-12.4.67 - - https://www.curseforge.com/minecraft/mc-mods/improvable-skills
-ImprovedMobs-1.12.2-1.6.10 - - https://www.curseforge.com/minecraft/mc-mods/improved-mobs
-jei_1.12.2-4.16.1.302 - - https://www.curseforge.com/minecraft/mc-mods/jei
-JJ+Races+1.12-1.12.2-v1.0.14 - - https://www.curseforge.com/minecraft/mc-mods/jj-races
-journeymap-1.12.2-5.7.1 - - https://www.curseforge.com/minecraft/mc-mods/journeymap
-levelhearts-1.12.2-2.4.0 - - https://www.curseforge.com/minecraft/mc-mods/levelhearts
-llibrary-1.7.20-1.12.2 - - https://www.curseforge.com/minecraft/mc-mods/llibrary
-LootBags-1.12.2-2.5.8.5 - - https://www.curseforge.com/minecraft/mc-mods/lootbags
-Mantle-1.12-1.3.3.55 - - https://www.curseforge.com/minecraft/mc-mods/mantle
-MusicCraft-3.2.3 - - https://www.curseforge.com/minecraft/mc-mods/musiccraft-mod
-obfuscate-0.4.2-1.12.2 - - https://www.curseforge.com/minecraft/mc-mods/obfuscate
-OptiFine-1.12.2_HD_U_G5 - - https://optifine.net/adloadx?f=OptiFine_1.12.2_HD_U_G5.jar&x=be5c
-ordinarycoins-1.12.2-1.5 - - https://www.curseforge.com/minecraft/mc-mods/ordinary-coins
-Pam's+BreadCraft+1.12.2-1.1.2 - -https://www.curseforge.com/minecraft/mc-mods/pams-breadcraft
-Pam's+HarvestCraft+1.12.2zg - - https://www.curseforge.com/minecraft/mc-mods/pams-harvestcraft
-Patchouli-1.0-23.6 - - https://www.curseforge.com/minecraft/mc-mods/patchouli
-PizzaCraft-1.12.2-2.0.19 - - https://www.curseforge.com/minecraft/mc-mods/pizzacraft
-TConstruct-1.12.2-2.13.0.183 - - https://www.curseforge.com/minecraft/mc-mods/tinkers-construct
-TenshiLib-1.12.2-1.2.4 - - https://www.curseforge.com/minecraft/mc-mods/tenshilib
-Thaumcraft_1.12.2_6.1.BETA26 - - https://www.curseforge.com/minecraft/mc-mods/thaumcraft
-ThaumicAugmentation-1.12.2-2.1.5 - - https://www.curseforge.com/minecraft/mc-mods/thaumic-augmentation
-ThaumicJEI-1.12.2-1.6.0-27 - - https://www.curseforge.com/minecraft/mc-mods/thaumic-jei
-tinkersjei-1.2 - - https://www.curseforge.com/minecraft/mc-mods/tinkers-jei
-TravelersBackpack-1.12.2-1.0.35 - - https://www.curseforge.com/minecraft/mc-mods/travelers-backpack
-twilightforest-1.12.2-3.11.1021-universal - - https://www.curseforge.com/minecraft/mc-mods/the-twilight-forest
-Voice+Chat+Reloaded-1.2.5 - - https://www.curseforge.com/minecraft/mc-mods/glibys-voice-chat-reloaded
-Wawla-1.12.2-2.6.275 - - https://www.curseforge.com/minecraft/mc-mods/wawla
-WizardryFates-2.1.0 - - https://www.curseforge.com/minecraft/mc-mods/wizardry-fates/files/3364977

Logs (Use a site like pastebin, gist etc. DONT COPY PASTE THE LOG IN HERE):

https://pastebin.com/Ry7sFV4N

because of TenshiLib (actually it's more of it, so I figured it was ImprovedMobs since TenshiLib is the main library)

again why you think its that mods fault?

nothing in log says anything about this mod. why you think its this mods fault?

because his library appeared in one of the WARNING.

yes but that doesnt mean anything.
remove the mod and check if it crashes and if it still does its not this mods fault

ok, i will remove and test without it and see what happens when I can. anyway thanks for viewing the issue :) i update the result soon so it is closed or not.

dude, sorry i think i figured out the reason for the fatal crashes that were occurring. Although never mentioned in the error files it was another mod that had caused me problems before. Sorry for disturbing you and thank you very much for your attention anyway.

if you prefer delete the entire issue as it was a false alarm. sorry.