I also have this bug in the volcano area, as well as the problem of my thralls getting stuck. I confirmed this is not a mod issue as it happens with all of my mods disabled and has only been a problem since the last patch. I can use the teleporters everywhere else they are placed, but attempting to ignite the one in my volcano base gives this error. I suspect the last mod screwed up something with the tiles above a certain altitude, as my followers also get stuck just outside the volcano near the entrance by the frost giant dungeon, as soon as I start climbing above the frost giant camp.