this is maybe not a real bug (maybe i'm dumb) if someone read m issue from yesterday, i fixed something myself and the game crashed with "java.lang.IllegalAccessError: tried to access field net.minecraft.item.ItemHoe.field_185072_b from class epicsquid.roots.item.runed.ItemRunedHoe" so how to compile this mod corectly?

I'm not sure what you mean by this. Can you provide some more context?

Is this error occurring in-game? Is this happening when you try to compile the mod yourself? Is this happening with another mod installed?

If I compile the mod myself even if change nothing on the source (3.1.5) on starting Minecraft (just roots and it's dependencies) I get the error from top
I compile with jdk 8 and:
call gradlew.bat build

If I use the precompiled ones from curse this doesn't happen

Ah, the current release is 3.1.4. There might be an issue with 3.1.5. I'll look into it some time today, as I've been asked to do the 3.1.5 release.

Oh okay I'll try again I already have wondered why the 3.1.5 also is named 3.1.4