wrap saving of url_parsed in conditional, since url isn't set during setup

app.js

@@ -104,8 +104,10 @@ function loadConfig() {
 	nconf.set('core_templates_path', path.join(__dirname, 'src/views'));
 	nconf.set('base_templates_path', path.join(nconf.get('themes_path'), 'nodebb-theme-persona/templates'));
 
+	if (nconf.get('url')) {
 		nconf.set('url_parsed', url.parse(nconf.get('url')));
 	}
+}
 
 
 function start() {