Kaltura_Client_Exception thrown

Invalid KS "ODdhOGU3NGU2ZDQ1MTg5NWViOGQ5NDEwNWQ2NDhlZTU0NTlhM2ZmMXwxMDE7OzE0ODc4NzA5NDk7MjsxNDg3Nzg0NTQ5LjMyODc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"