Whirl Islands Help

hi everyone, so I sailed lapras to whirl island but when i get inside the cave i get this: [A4][EE][86][B9]: invalid chunk type CNoFile Object: Graphics/Tilesets/tileset_cave.png

After clicking ok: the cave is dark and you can barely navigate.

What should I do ? Please help.

You’re missing that tileset, redownloading is probably the easiest solution.