UPDATE

app.py

@@ -192,7 +192,7 @@ async def audio_editor(event):
         # Load the audio file using your AudioFusion class
         audio = Fusion.loadSound(file_path)
     except Fusion.InvalidMusicFileError as e:
-        await event.respond(f'Error: {e}')
+        await event.reply(f'Error: {e}')
         return os.remove(file_path)