https://prnt.sc/vwyhwo

I'm sorry, but I don't have time to fix these issues at the moment.
For now you'll have to use version 1.1.5 on stable factorio until I have time (unless you can fix it yourself).
Thanks for reporting though.

yes bug

problem fix?

no, sorry, no time. fix later, not now

1.1.6
https://yadi.sk/i/8fRPY1rqMESEJw

Fixed it, replace the _prototype.tile block in proto.lua, line 478 by

_prototypes.tile = { -- Tiles
    common = {type = "tile", decorative_removal_probability = 1, collision_mask = {"ground-tile"}, needs_correction = false, 
        ageing = 0, group = _prototypes.item_group.surfaces.name
    },
    underground_dirt = {
        name = "underground-dirt",
        icon = _gfxpath.icon .. "underground-dirt.png",
        icon_size=64,
        layer = 45,
        variants = struct.Variants(_gfxpath.terrain, "underground-dirt", {4,0,0,0,0,0}, {1}),
        walking_speed_modifier = 0.8,
        map_color = util.RGB(107, 44, 4),
        pollution_absorption_per_second = 0.0000066
    },
    sky_void = {
        name = "sky-void",
        icon = _gfxpath.icon .. "sky-void.png",
        icon_size=64,
        layer = 45,
        collision_mask = {"ground-tile", "resource-layer", "floor-layer", "item-layer", "object-layer", "player-layer", "doodad-layer"},
        variants = struct.Variants(_gfxpath.terrain, "sky-void", {2,0,0,0,0,0}, {1}),
        map_color = util.RGB(4, 172, 251),
        pollution_absorption_per_second = 0.0000066
    },
    underground_wall = {
        name = "underground-wall",
        icon = _gfxpath.icon .. "underground-wall.png",
        icon_size=64,
        layer = 46,
        collision_mask = {"floor-layer", "item-layer", "doodad-layer"},
        variants = struct.Variants(_gfxpath.terrain, "underground-wall", {1,0,0,0,0,0}, {1}),
        map_color = _prototypes.entity.underground_wall.map_color,
        pollution_absorption_per_second = 0.00001
    },
    floor = {
        common = {minable = {hardness = 0.2, mining_time = 0.5}, walking_speed_modifier = 1, subgroup = _prototypes.item_subgroup.surfaces.tile.name,
            override = true},
        wood = {
            name = _prototypes.item.floor.wood.name,
            layer = 59,
            variants = struct.Variants(_gfxpath.terrain, _prototypes.item.floor.wood.name, {1,1,1,1,1,1}, {1}),
            map_color = util.RGB(193, 140, 89),
            pollution_absorption_per_second = 0.000005
        }
    }
}

was just three icon_size=64 missing

Thank you very much! If you are familiar with git, feel free to create a pull request. If not I will commit the changes myself and publish a new version of the mod very soon.

Merge request done ...

New version published on the Mod Portal, it should work now.