Since the release of Minecraft 1.12, I’ve become almost reliant upon the new Auto craft recipe book. This feature is a huge time saver when condensing materials like coal and redstone into blocks.
I recently updated spigot on OnoviaCraft and found that players could no longer use the auto craft feature. Apparently the developers have added a permission to counter a discovered exploit in the auto craft feature.
If you would like to restore this feature, you can give users minecraft.autocraft permission. This will allow any users or groups to use auto craft.
You can read some discussion and confirmation on this here.