Kaltura_Client_Exception thrown

Invalid KS "OTMxMmQyMzIxYTBjNzkxNzQzOWI2ZTgzZWEzMWUxZDNiMThiNzY2MnwxMDE7OzE0NzQ4ODEzMzk7MjsxNDc0Nzk0OTM5LjUwOTI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"