Update app.py

app.py

@@ -836,7 +836,7 @@ def classify(platform, UserInput, Images, Textbox2, Textbox3):
                     print("Error: Image data is not available.")
                     return None
 
-            if UserInput.lower() is not None:
+            if UserInput is not None:
                 caption = UserInput.lower()
             else:
                 caption = None