Kaltura_Client_Exception thrown

Invalid KS "NDYxM2RiNTRlODMwOGNhYzg0M2QzNDgwYjc3ZTI4MzcxY2QwMzg2YXwxMDE7OzE0ODE0NDc2MDM7MjsxNDgxMzYxMjAzLjIyNjE7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"