Downgrade to Gradio 4.44.1 and add explicit server config

app.py

@@ -1,5 +1,5 @@
 """
-Architecture AI Enhancer - Simple Gradio Interface for HF Spaces
+""" Architecture AI Enhancer - Simple Gradio Interface for HF Spaces
 """
 import gradio as gr
 import torch
@@ -7,6 +7,7 @@ from PIL import Image
 import logging
 from pathlib import Path
 import sys
+import os
 
 # Add backend to path
 sys.path.insert(0, str(Path(__file__).parent))
@@ -100,4 +101,10 @@ iface = gr.Interface(
 )
 
 if __name__ == "__main__":
-    iface.queue().launch()
+    # HF Spaces requires explicit server configuration
+    iface.queue().launch(
+        server_name="0.0.0.0",
+        server_port=int(os.getenv("PORT", 7860)),
+        share=False,
+        show_error=True
+    )

requirements.txt

@@ -16,7 +16,7 @@ numpy>=1.24.0
 basicsr>=1.4.2
 
 # Gradio interface
-gradio==5.6.0
+gradio==4.44.1
 
 # Configuration
 pydantic>=2.5.0