On latest version. Consistent crash while trying to place brick path down. I recieve this error message:

50.739 Error MainLoop.cpp:1019: Exception at tick 504071: Error while running event LandfillPainting::on_player_built_tile (ID 45)
LandfillPainting/control.lua:13: attempt to index field 'next_direction' (a nil value)

Could also be conflicts with other mods; I'm playing with Bobs, Angels, Alien Biomes and more.

Hey there. I confirm this, when I disabled Alien biomes, everything works as intended. Any chance of a compatibility patch? Will ask the author of biomes as well...

I can confirm that this is an inter-mod compatibility problem. I disabled all mods except this one and had no problems.

I had Dectorio installed, and attempts to place any sort of artificial tile (brick, concrete, ore gravel, etc) caused the same error.