Update app.py

app.py

@@ -172,10 +172,11 @@ def generate_audio(text,speaker_id=None):
 
 
 def   get_answer_ai(text,session_ai):
-     
+      
       try:
-          response = session_ai.send_message(text,stream=True)
-          return response,session_ai
+          if session_ai is not None:
+                  response = session_ai.send_message(text,stream=True)
+                  return response,session_ai
 
           
       except :pass