Kaltura_Client_Exception thrown

Invalid KS "OTdmNmZiOTc3OTAxY2RlMjcyNjVkMDA4NDhmMmI2NmJmYTA0NzBmOXwxMDE7OzE0OTg4MjgxNzc7MjsxNDk4NzQxNzc3Ljg5MTY7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"