HTTP ERROR 500

I am facing the following problem-
Warning: require_once(/home/vol10_6/epizy.com/epiz_20479405/htdocs/wp-includes/widgets/class-wp-widget-custom-html.php): failed to open stream: No such file or directory in /home/vol10_6/epizy.com/epiz_20479405/htdocs/wp-includes/default-widgets.php on line 65

Fatal error: require_once(): Failed opening required ‘/home/vol10_6/epizy.com/epiz_20479405/htdocs/wp-includes/widgets/class-wp-widget-custom-html.php’ (include_path=‘.:/usr/share/pear/’) in /home/vol10_6/epizy.com/epiz_20479405/htdocs/wp-includes/default-widgets.php on line 65

Anyone Please help me What can I do?

Best I can tell, it’s a corrupted WordPress installation. An easy way to fix that is to download a fresh copy of WordPress, extract it and upload it to your hosting account, overwriting any files already in your account. Doing so will fix any corrupted file and restore any missing ones.