Update app.py

app.py

@@ -208,7 +208,7 @@ if selected_task :
     context_input = display_context(task)
     if get_input(uploaded_input,url_input,text_input):
         input = get_input(uploaded_input,url_input,text_input) 
-        if prompt_input:
+        if prompt_input is not None:
             response = getattr(client, task)(input,question=prompt_input)
         else:
             response = getattr(client, task)(input)