I had just started the mod, connected power, setup two lines (Iron/Copper) ran a line of iron to an assembler to the two turrets west of the silo. Connected to that and 4 more turrets, + 4 more next to the other 2 turrets, with the ammo line. Dropped a second assembler for ammo, and was drawing a belt over the rocks, south of the two starting turrets, and south of the silo, when the crash occurred. Say "LUA player doesn't contain clean cursor" in event function on_pre_build, in "local success = player.clean_cursor()".
One other item that may help debug this: I have Settings->Interface->Pick Ghost turned on.
https://drive.google.com/file/d/1T6whXfR1LImSH70C2Q79IeQJa6WVcLSQ/view?usp=sharing
