Kaltura_Client_Exception thrown

Invalid KS "OTVjODc1NmQyNWMzZjA0YWM0NWMwZGYxNzAxY2ZhYjY1NTJiYmI1M3wxMDE7OzE0NzUzNDI3ODA7MjsxNDc1MjU2MzgwLjU3OTY7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"