As the title says, the game crashes every time I put anything in the architects cutter.

Error Message:

The game crashed whilst rendering screen
Error: java.lang.NullPointerException: Cannot invoke "net.minecraft.world.inventory.Slot.m_6657_()" because "containerScreen.f_97734_" is null

Huh, yeah. That's done the trick. Never realy used EquipmentCompare so nothing lost XD.

full log please

https://gist.github.com/Mazzaradi/8eb11d42db1a764d899646d6b743f829

Is this on a server?

Nope. It was on a single player world

can you try without AE installed?

Just tried it then without AE. Same thing.

do you know how to add "-Dmixin.debug.export=true" to the jvm args?

I think so. What would it do?

It will generate additional log output we can use to analyze what is happening. Some mod is changing vanilla here and we gotta find out how and which =D

I've added the code to the end of the jvm args. What should I do now?

make it crash again and then send us <.minecraft>/.mixin.out/classes

mixin.out.zip

I hopefully did it correctly

Yep, perfect. Its an incompatibility with EquipmentCompare

fixed in latest equipment compare