fix a bug

app.py

@@ -216,7 +216,7 @@ with gr.Blocks() as demo:
         queue=False
     ).then(
         fn=clear_task, 
-        outputs=[cache_task_uuid, block_prompt, block_prompt_hint, fake3d], 
+        outputs=[cache_image_base64, cache_task_uuid, block_prompt, block_prompt_hint, fake3d], 
         show_progress="hidden",
         queue=False
     )