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Fatal error: require(): Failed opening required '/var/www/html/vendor/composer/../symfony/polyfill-php54/bootstrap.php' (include_path='/var/www/html/vendor/pear/pear_exception:/var/www/html/vendor/pear/console_getopt:/var/www/html/vendor/pear/archive_tar:/var/www/html/vendor/pear/pear-core-minimal/src:.:/usr/local/lib/php') in /var/www/html/vendor/composer/autoload_real.php on line 70