Can't create timber framing

[cto-jean]

1st - What a beautiful mod. I love the textures and the old world feel of the blocks. Thank you for taking the time to make it.

Minecraft 1.12.2 Forge 1.12.2-14.23.0.2512

I've created my lath and plaster to create some fancy walls for my dwelling, but when I try to put normal oak wood logs into the workbench to create the timber framing, the "Move Items" plus button doesn't light up, and when I mouse over it, it tells me that items are missing.