JSON Error Message Displayed in Kunena

I'm getting this error message

Warning: json_decode() expects parameter 1 to be string, array given in /home/mysite/public_html/administrator/components/com_easysocial/includes/json/json.php on line 62

It's being displayed when I look any individual message on my Kunena forum. More specifically it appears in the user area to the left of the body text and above the avatar. Apart from that the forum seems to work fine so I'm thinking a problem between Kunena and ES.

ES code referenced is this

	public function decode( $data )

	{

		if( empty( $data ) )

		{

			return false;

		}



		$pattern 	= '#^\s*//.+$#m';

		$data 		= preg_replace( $pattern , '' , $data );



		$result = json_decode( $data );



		return $result;

	}

Line 11 (62)