Block entity not working when generated

Hello, I'm currently making a mod just for fun to try and learn Mcreator a bit (first time). I've made a lot of stuff and wanted to create a block that work a bit like furnace but with special items. Seeds + Reinforced leather = better leather    and . Then I wanted to make a sctructure with this block inside, that's what I did. All is working but when I put the items inside the block, it does nothing, iI d'ont know why???  Please help me I cant find anything to help. Here is the code for the kinda furnace i made