Kaltura_Client_Exception thrown

Invalid KS "YmQxMzJlZjk0Y2U2MDZmNmJmMzE0NzdjMWY4ZTcwOGM5NzZiMTQzMHwxMDE7OzE0OTMwNzgxMDQ7MjsxNDkyOTkxNzA0LjYxMzE7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"