Title: Fatal Error – Warning: require_once
Last modified: August 31, 2016

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# Fatal Error – Warning: require_once

 *  [diamantino_jr](https://wordpress.org/support/users/diamantino_jr/)
 * (@diamantino_jr)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-warning-require_once/)
 * I can’t install the Less PHP Compiler Plugin.
 * When I try… happen the error’s bellow:
 * Warning: require_once(__DIR__/less-php/less.php) [function.require-once]: failed
   to open stream: No such file or directory in /var/www/html/MYSITE/web/wordpress/
   wp-content/plugins/lessphp/less-plugin.php on line 12
 * Fatal error: require_once() [function.require]: Failed opening required ‘__DIR__/
   less-php/less.php’ (include_path=’.:/usr/share/pear’) in /var/www/html/MYSITE.
   com.br/web/wordpress/wp-content/plugins/lessphp/less-plugin.php on line 12
 * How I can Fix that?
 * [https://wordpress.org/plugins/lessphp/](https://wordpress.org/plugins/lessphp/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Unyson](https://wordpress.org/support/users/unyson/)
 * (@unyson)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-warning-require_once/#post-6997876)
 * Hello,
 * Check file permissions. Make sure they are `644` for files (not `600`)

Viewing 1 replies (of 1 total)

The topic ‘Fatal Error – Warning: require_once’ is closed to new replies.

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## Tags

 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)

 * 1 reply
 * 2 participants
 * Last reply from: [Unyson](https://wordpress.org/support/users/unyson/)
 * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-warning-require_once/#post-6997876)
 * Status: not resolved