Update app.py

app.py

@@ -5,7 +5,7 @@ f = modal.Cls.lookup("casa-interior-hf-v1", "DesignModel")
 def casa_ai_run(dict=None, text=None):
 
     image = dict["background"].convert("RGB")
-    mask = dict["layers"][0].convert("RGB")
+    mask = dict["layers"][0].convert('L')
     
     if image is None and text is None: 
         print('Please provide context in form of image, audio, text')