Not the volumes of my magazine shows

help:
Fatal error: require() [function.require]: Failed opening required ‘HTMLPurifier/Strategy/RemoveForeignElements.php’ (include_path=’/home/cmhnaaa/public_html/ojs/lib/pkp/lib/htmlpurifier/library:.:/home/cmhnaaa/public_html/ojs/classes:/home/cmhnaaa/public_html/ojs/pages:/home/cmhnaaa/public_html/ojs/lib/pkp:/home/cmhnaaa/public_html/ojs/lib/pkp/classes:/home/cmhnaaa/public_html/ojs/lib/pkp/pages:/home/cmhnaaa/public_html/ojs/lib/pkp/lib/adodb:/home/cmhnaaa/public_html/ojs/lib/pkp/lib/phputf8:/home/cmhnaaa/public_html/ojs/lib/pkp/lib/pqp/classes:/home/cmhnaaa/public_html/ojs/lib/pkp/lib/smarty:.:/usr/lib/php:/usr/local/lib/php’) in /home/cmhnaaa/public_html/ojs/lib/pkp/lib/htmlpurifier/library/HTMLPurifier.includes.php on line 195

Please I need help to solve this problem, not the volumes created, the editor imgresar can see that if this content, can not be happening that is. Thank you

Does the following file exist on your server?
/home/cmhnaaa/public_html/ojs/lib/htmlpurifier/library/HTMLPurifier/Strategy/RemoveForeignElements.php

Do the full path and name match in case sensitivity and to the file permissions allow your web user to read it?