Kaltura_Client_Exception thrown

Invalid KS "MDVlYWE3NjQwNjA4ZDUxZDViYzJlZDMzYjFiNzNmMGZhY2I0NzllYXwxMDE7OzE0OTg1ODUxNjQ7MjsxNDk4NDk4NzY0LjU3Njk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"