Kaltura_Client_Exception thrown

Invalid KS "OGVjNTcyNzIwYTRhODdjM2FiODg2MTQxMjBkZDc1YzlmOGJiNTA0NHwxMDE7OzE0OTMyNDY1NTU7MjsxNDkzMTYwMTU1LjUyOTc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"