Need Help on OJS after changing site name

Hi every one,
Recently I have installed OJS and several days working on it to setup and etc, every things go fine until today when I have change the site name in site setting. After that OJS does not appear any more and I will get Error 500 even I will try from any other browsers have the same problem. The log error is as following

[26-Dec-2017 05:43:19 UTC] PHP Fatal error: Call to a member function smartyEscape() on string in /home/sitename/public_html/ojs/cache/t_compile/46fa2a4d1c2dfdfb7e296f4a3f7227463c634e62^%%B5^B5A^B5A5842A%%dashboardMenuItem.tpl.php on line 6

clear all cache files and t_compile contents