We cannot attack a mine, whenever we try(vice or leader doesnt matter, same message) we get a message saying "you cannot occupoy this mine!"
Its irrelevant if its a occupied mine or a unoccupied mine its the same message. I know we have enough troops because even if we attack a unoccupied level 1 with 20k+ cats we still get the same error message. This has been tried on multiple versions of the program across multiple OS's and OS versions both android and iOS.
pic attached below