Hi, happy you like it!

It’s a bit hard to be sure without your code, but it looks to me like the BuildingData instance you’re passing to the new Building() constructor in your _PreparePlacedBuilding() method is null; are you sure you filled the list in the Globals.cs file properly? :)

Otherwise if you want, you can send me your code via Github or email (mina.pecheux@gmail.com) and I can take a look ;)