Update app.py

app.py

@@ -117,7 +117,7 @@ def style_mixing_interface(image1, image2, mix_value):
     buffer.seek(0)
     return mixed_img, buffer
 
-def send_to_backend(image_buffer, 74):
+def send_to_backend(image_buffer, "74"):
     if not user_id:
         return "❌ user_id not found."