Kaltura_Client_Exception thrown

Invalid KS "OGM5NTNkMjQ5ZjNjOGM0OTE4NTJlMDU2NDA4ZTk3YjY2ZjFiMzgwNnwxMDE7OzE0OTg1NDMyNzA7MjsxNDk4NDU2ODcwLjk0OTk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"