Update app.py

app.py

@@ -404,7 +404,7 @@ def generate_auswahl(prompt, file, chatbot, history, rag_option, model_option, o
         #Bild ausgeben
         image = Image.open(io.BytesIO(result)) 
         image_64 = umwandeln_fuer_anzeige(image)
-        chatbot[-1][1] =  "<img src='data:image/png;base64,{0}'/>".format(b64encode(image_64).decode('utf-8')) 
+        chatbot[-1][1] =  "<img src='data:image/png;base64,{0}'/>".format(base64.b64encode(image_64).decode('utf-8')) 
         history = history + [(prompt, result)]  
         return chatbot, history, gr.File(visible=False), "Success"
     else: