Update app.py

app.py

@@ -252,10 +252,13 @@ def dash(text,session_ai,is_state=True):
     response,session_ai=get_answer_ai(text,session_ai)
     txt=' '
     for chunk in  response:
-        if is_state:
-           txt+=chunk.text
-        else: 
-           txt=chunk.text
+        if chunk is not None:
+            try:
+                if is_state:
+                   txt+=chunk.text
+                else: 
+                   txt=chunk.text
+            except:pass
         
         
         yield txt,session_ai