Kaltura_Client_Exception thrown

Invalid KS "Y2EzZmJmYzk4ZTIwMGU1ZGU3ZDU2MDEzYWM3ZjcwMzVjNjA5NDY3NnwxMDE7OzE0NzUyMzcyMDI7MjsxNDc1MTUwODAyLjI3NDg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"