Kaltura_Client_Exception thrown

Invalid KS "NTNmOWQ5MWVhNjBmYjNmYTA5NzY0MmM2NmM5ZGY4M2NmZjllMTk3YnwxMDE7OzE0ODUxNTA5NDQ7MjsxNDg1MDY0NTQ0LjMwNzY7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"