Fatal error: Uncaught Error: SMW\Setup::initExtension(): Argument #1 ($vars) could not be passed by reference in /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/extensions/SemanticMediaWiki/includes/SemanticMediaWiki.php:46
Stack trace:
#0 /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/includes/registration/ExtensionRegistry.php(527): SemanticMediaWiki::initExtension()
#1 /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/includes/registration/ExtensionRegistry.php(279): ExtensionRegistry->exportExtractedData()
#2 /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/includes/Setup.php(278): ExtensionRegistry->loadFromQueue()
#3 /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/includes/WebStart.php(86): require_once('...')
#4 /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/index.php(44): require('...')
#5 {main}
  thrown in /mnt/web018/e2/08/52039108/htdocs/Drebbel_niet/wiki/extensions/SemanticMediaWiki/includes/SemanticMediaWiki.php on line 46