Update app.py

app.py

@@ -237,9 +237,9 @@ async def count_forum_threads(ctx, time: int):
 async def top_gradio(ctx, channel_id):
     if ctx.author.id == 811235357663297546:    
         message_counts = {}
-        channel = bot.get_channel(channel_id)
-        
         try:
+            channel = await bot.fetch_channel(channel_id)
+            
             async for message in channel.history(limit=None):
                 message_counts[message.author] = message_counts.get(message.author, 0) + 1
         except discord.Forbidden: