Kaltura_Client_Exception thrown

Invalid KS "NTQ1N2ZlYWU4MjExNmM4OGQ5Mjk0Y2YxNjUxOTdlNGNiOTFjYjVjMnwxMDE7OzE0OTg1NDc5NDE7MjsxNDk4NDYxNTQxLjc5NzE7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"