Played a bit with the project and got it all working. Something on my box wouldn't clean itself. Once I got it all cleared, it compiled fine.
Thanks!
Absolutely, should have thought of that.
v4.2.1.stable.mono.official [b09f793f5]
Just got it and ran the build. This error caused the build to fail:
addons\assetplacer\assetPalette\AssetPalette.cs(641,15): error CS0029: Cannot implicitly convert type 'Godot.MeshInstance3D' to 'Node3D'
