Expected Behavior

Be able to trade with villagers in desktop mode

Current Behavior

Game crashes when attempting to trade with villagers and (assuming) wandering traders

Steps to Reproduce

1. Summon villager
2. Trade with villager by selecting its trade and putting trade items into its inventory with the mouse.
3. Game crashes

Version

1.20.4-1.4.4+fabric

Mods Used & Game Version

Game Version: 1.20.4

Modlist

Architectuary API 11.1.17+fabric
Fabric API 0.96.4+1.20.4
Legacy4J 1.20.4-1.4.4+fabric

Step 2-1. Use Legacy4J on a server without it (hypothesis)
You are probably trying auto trade on a server without the mod, my game never crashed when using the mod in a singleplayer world and not even on a dedicated server with Legacy4J. You can also manually trade with the villager/merchant as seen in #140

I initially experienced the problem in multiplayer (through manually trying to trade, because auto-trading doesn't work on multiplayer on servers without the mod. I then tried it in singleplayer to see if I have the same issue. The crash only happens when trying to manually trade (putting the item in the slot). See video for more information.

I can provide crash logs and game logs if you can't reproduce the glitch on your end, if those would help :)