Kaltura_Client_Exception thrown

Invalid KS "ODAwMGU3ZTQyZjIzZGFhZTBhZGIyMjQ4NDE2MDllMzJkYzIwMDk1MXwxMDE7OzE0NzI2NzE2OTU7MjsxNDcyNTg1Mjk1LjA3NTE7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"