Kaltura_Client_Exception thrown

Invalid KS "ZDgzN2Y1MGU1NDk3YTc3NTU0NzQzNzU4ZDc4ZWIxZThiYzcxZGJlN3wxMDE7OzE0OTM1MzIwMzE7MjsxNDkzNDQ1NjMxLjQxNjM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"