When submitting information in a form, I receive the following errors (this was working previously, and these files are present)
Warning: require_once(/home/admin/public_html/wp-includes/class-smtp.php) [function.require-once]: failed to open stream: No such file or directory in /home/admin/public_html/wp-includes/pluggable.php on line 283
Fatal error: require_once() [function.require]: Failed opening required '/home/admin/public_html/wp-includes/class-smtp.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/admin/public_html/wp-includes/pluggable.php on line 283