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Warning: proc_open(): fork failed - Cannot allocate memory in /var/www/html/mediawiki/includes/shell/Command.php on line 402

Warning: proc_open(): fork failed - Cannot allocate memory in /var/www/html/mediawiki/includes/shell/Command.php on line 402

Warning: proc_open(): fork failed - Cannot allocate memory in /var/www/html/mediawiki/includes/shell/Command.php on line 402

Fatal error: Out of memory (allocated 20971520) (tried to allocate 155648 bytes) in /var/www/html/mediawiki/includes/AutoLoader.php on line 109