Update app.py

app.py

@@ -243,6 +243,10 @@ async def on_message(message):
                 embed = discord.Embed(title="Success", description=f"Lyre is now unable to chat in {args[0]}")
                 await message.reply(embed=embed)
                 return 0
+            else:
+                embed = discord.Embed(title="Error", description=f"Lyre was already unable to chat in {args[0]}")
+                await message.reply(embed=embed)
+                return 0
         else:
             embed = discord.Embed(title="Error", description="Parameter `[channel]` is not in valid forms, or does not exist. Use `--help` for command help.")
             await message.reply(embed=embed)