Kaltura_Client_Exception thrown

Invalid KS "ZmQwMTg4MjI2YmI3MmQ0NTcxMWQxNThkOWQzNzk3OGQyNjkyNjBjYXwxMDE7OzE0OTg1NDMwMjU7MjsxNDk4NDU2NjI1LjM0NDU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"