With update to game version 0.16.17 your mod runs into LUA error while placing watefills:

Error while running event Explosive Excavation::on_player_built_tile (ID 45)
Explosive Excavation/control.lua:3: bad argument #1 to 'pairs' (table expected, got nil)

That is not my mod giving that error but instead it is caused by this mod: https://mods.factorio.com/mod/Explosive%20Excavation .

My fault, this mod seems to interact with your waterfills. Thanks for details.

No biggy, better to report stuff than to not report it at all.

The specific crash would happen with any placed tiles (from vanilla, and other mods).