Kaltura_Client_Exception thrown

Invalid KS "ZjU1Y2Q1MzU1ODQ3Zjg1NjMyODNiZDk0MGVhZjQzNDdhMmY3NTdkNHwxMDE7OzE0OTMwMjgxMjE7MjsxNDkyOTQxNzIxLjYyMzk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"