Update app.py

app.py

@@ -436,7 +436,7 @@ def invoke (prompt, file, history, rag_option, model_option, openai_api_key, k=3
     if (prompt.find('zeichnen') != -1):
         #Bild ausgeben
         image = Image.open(io.BytesIO(result))
-        history[-1][1] = file #image
+        history[-1][1] = (file.name,) #image
         print("history......................")
         print(history)
         return history, "Stop: Success"