Nice widget but No data displayed

Hi, I’m using Twenty Twelve theme. Would really like to use this compact stylish widget; so, I placed this widget into sidebar, no problem getting the API key, but no data showing up. Website is http://www.bhca2015nationals.com; here’s some error code I found:

function form($instance) {
		$instance = wp_parse_args((array) $instance, array('title'=>'','city'=>''));

		// error message
		$error = get_option("trazww_error");
		if (!empty($error)) {
			echo '<p style="color:red;font-weight:bold">Error: '.htmlentities($error).'</p>';
		}

https://ww.wp.xz.cn/plugins/weather-widget-by-calcatraz/