Kaltura_Client_Exception thrown

Invalid KS "MjQ3N2Q5MGY4OTkxM2Y3ZjdhZjIxNzEzZmJiYjE1Y2ZjMWM0YjIzYnwxMDE7OzE0ODgwMzYyOTM7MjsxNDg3OTQ5ODkzLjcwNzM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"