Kaltura_Client_Exception thrown

Invalid KS "OTQ3YjQyMmUwZjVlNWVmZDRiZDk0MGRmMTdkNWRkNDg1MmJhZWM0NHwxMDE7OzE0NzUyMTk3NTQ7MjsxNDc1MTMzMzU0LjA4Nzc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"