I used the Linker to right-click, then shift-right-click on a block of stone. The block was replaced by a block called "entity.lift.name". I'm not able to mine this block. Have tried clicking it with the Linker again, empty hands, left / right, creative mode - nothing works. How do I remove a single Elevator block? Or is this a bug?

Found it. You can remove it by right-clicking with a stick.