After update 2.0 => 3.0 version, i removed cache.lock file, but new one didn't created when i lunched game.

I found this lines in debug.log file:

[21:41:11] [ThaumicSpeedup/AspectThread/ERROR] [FML]: Exception caught during firing event thaumcraft.api.aspects.AspectRegistryEvent@51ffec23:
java.util.ConcurrentModificationException: null
	at com.google.common.collect.HashBiMap$Itr.hasNext(HashBiMap.java:401) ~[guava-21.0.jar:?]
	at java.util.Collections$UnmodifiableCollection$1.hasNext(Collections.java:1041) ~[?:1.8.0_51]
	at thaumcraft.common.lib.crafting.ThaumcraftCraftingManager.generateTagsFromCraftingRecipes(ThaumcraftCraftingManager.java:500) ~[ThaumcraftCraftingManager.class:?]
[...]
	at thaumcraft.api.aspects.AspectEventProxy.registerComplexObjectTag(AspectEventProxy.java:55) ~[AspectEventProxy.class:?]
	at vazkii.botania.common.integration.thaumcraft.TCAspects.registerComplex(TCAspects.java:472) ~[TCAspects.class:?]

Modpack: https://github.com/Krutoy242/Enigmatica2Expert-Extended

Is this means Thaumic-Speedup uncompatible with some mods? Should i return to 2.0 version?

debug.log

There is no such file:

So, i don't get it right: is mod not working right now because of this exception?

cache.lock no longer is needed. I'll fix that bug though, it seems like mods that use the event to register aspects ends up bugging out.

cache.lock no longer is needed

So, where cached file stored? I want to supply it with modpack files, so players would have fast first load.

.minecraft/caches/thaumicspeedup/aspects_cache.bin

Possibly, do you have Persistency installed?

Possibly, do you have Persistency installed?

Yes, i do.
Its also listed in mod list in debug.log from zero post.

Fixed now @Krutoy242.