Update app.py

app.py

@@ -19,10 +19,12 @@ import asyncio
 import aioice
 
 def ensure_event_loop():
-    loop = asyncio.get_event_loop()
-    if loop.is_closed():
+    try:
+        loop = asyncio.get_event_loop()
+    except RuntimeError:  # No event loop found
         loop = asyncio.new_event_loop()
         asyncio.set_event_loop(loop)
+    return loop
 
 # Ensure loop is running before WebRTC setup
 ensure_event_loop()