try older gradio

app.py

@@ -9,6 +9,8 @@ import gradio as gr
 
 from model import Model
 
+print('gradio: ', gr.__version__)
+
 
 @spaces.GPU
 def main():
@@ -83,7 +85,7 @@ def main():
                              progress_text,
                          ])
 
-    # demo.queue(max_size=5)
+    demo.queue(max_size=5)
     demo.launch(debug=True)
 
 

requirements.txt

@@ -15,4 +15,4 @@ transformers==4.29.1
 trimesh==3.21.6
 xatlas==0.0.7
 spaces==0.23.2
-gradio==4.19.1
+gradio==4.1.2