Kaltura_Client_Exception thrown

Invalid KS "ZDhkOTVkZDAzNjExZTg2MzQwODBkZjBhODdjZjFlZTRkNjIzOTk0YnwxMDE7OzE0NzUzMDYzNDU7MjsxNDc1MjE5OTQ1LjY5ODQ7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"