Notice: Undefined property: Ratchet\Server\IoConnection::$XXXX
My Code is working fine locally. On remote server when sending data from local browser it generates notice as:

```
Notice: Undefined property: Ratchet\Server\IoConnection::$XXXX in /home/xx/server/xx/Server/vendor/cboden/ratchet/src/Ratchet/AbstractConnectionDecorator.php on line 31
```
