Fixed a bug.

app.py

@@ -63,7 +63,7 @@ def load_metadata_fn(comic_id: str):
     for folder in list_current_dir(AWS_BUCKET, f"{comic_id}/"):
         if "episode" in folder:
             json_path = f"s3://{AWS_BUCKET}/{folder}episode.json"
-            idx = int(folder.split("/")[1].split("-")[-1])
+            idx = int(folder.split("/")[2].split("-")[-1])
             episode_idx.append(idx)
             data = eval(aws_utils.fetch_from_s3(source=json_path).decode("utf-8"))
             comic_frames = []