[error] [client *] PHP Warning: require(/var/www/vhosts/**/httpdocs/vendor/facebook/xhprof/xhprof_lib/utils/xhprof_lib.php) [<a href='function.require'>function.require</a>]: failed to open stream: No such file or directory in /var/www/vhosts/**/httpdocs/vendor/composer/autoload_real.php on line 58, referer: http://**/index.php?module=CoreUpdater&action=oneClickUpdate [error] [client *] PHP Fatal error: require() [<a href='function.require'>function.require</a>]: Failed opening required '/var/www/vhosts/**/httpdocs/vendor/facebook/xhprof/xhprof_lib/utils/xhprof_lib.php' (include_path='/var/www/vhosts/**/httpdocs/vendor/phpunit/php-text-template:/var/www/vhosts/**/httpdocs/vendor/phpunit/phpunit-mock-objects:/var/www/vhosts/**/httpdocs/vendor/phpunit/php-timer:/var/www/vhosts/**/httpdocs/vendor/phpunit/php-file-iterator:/var/www/vhosts/**/httpdocs/vendor/phpunit/php-code-coverage:/var/www/vhosts/**/httpdocs/vendor/phpunit/phpunit:/var/www/vhosts/**/httpdocs/vendor/symfony/yaml:.:') in /var/www/vhosts/**/httpdocs/vendor/composer/autoload_real.php on line 58, referer: http://**/index.php?module=CoreUpdater&action=oneClickUpdate
Did you guys check your auto update, before you release an update?
Edit: https://github.com/piwik/piwik/issues/6127
