Impossible de publier dans Mediawiki

Après installation de mediawiki, impossible de publier un article, page blanche après le post du formulaire. Les messages d’erreurs dans error_log.

PHP Warning:  UtfNormal::loadData() [<a href=’function.loadData’>function.loadData</a>]: open_basedir restriction in effect. File(/UtfNormalData.inc) is not within the allowed path(s): (/var/www/vhosts/xxxxxxxx/httpdocs:/tmp) in /var/www/vhosts/xxxxxxxx/httpdocs/mediawiki/includes/normal/UtfNormal.php on line 229, referer: http://plesk2.xxxxxxxx/mediawiki/index.php?title=Accueil&action=edit
PHP Warning:  UtfNormal::loadData(UtfNormalData.inc) [<a href=’function.loadData’>function.loadData</a>]: failed to open stream: Operation not permitted in /var/www/vhosts/xxxxxxxx/httpdocs/mediawiki/includes/normal/UtfNormal.php on line 229, referer: http://plesk2.xxxxxxxx/mediawiki/index.php?title=Accueil&action=edit
PHP Fatal error:  UtfNormal::loadData() [<a href=’function.require’>function.require</a>]: Failed opening required ‘UtfNormalData.inc’ (include_path=’/var/www/vhosts/xxxxxxxx/httpdocs/mediawiki:
/var/www/vhosts/xxxxxxxx/httpdocs/mediawiki/includes:/var/www/vhosts/xxxxxxxx/httpdocs/mediawiki/
languages:.:’) in /var/www/vhosts/xxxxxxxx/httpdocs/mediawiki/includes/normal/UtfNormal.php on line 229,
referer: http://plesk2.xxxxxxxx/mediawiki/index.php?title=Accueil&action=edit

Version MediaWiki: 1.9.3
Server version: Apache/2.0.54
PHP 5.0.4 (safe_mode On / Register_Global Off)
mysql 4.1.20

La solution: copier tous les scripts commençant par Utf du répertoire /mediawiki/includes/normal/ dans /mediawiki/includes/