Bug introduced by 0.15.11. From changelog:8963.152 Error MainLoop.cpp:850: Exception at tick 4573574: Error while running event Bluebuild::on_tick (ID 0)
__Bluebuild__/control.lua:181: attempt to perform arithmetic on field 'miningtime' (a nil value)
Maybe checking if miningtime == nil then use mining_time?Changed LuaEntityPrototype::mineable_properties "miningtime" -> "mining_time" and "miningparticle" -> "mining_particle".