Fatal error: Uncaught Symfony\Component\Filesystem\Exception\IOException: Cannot rename "/tmp/class_index.phpwF4mII" to "/var/www/html/var/cache/dev/class_index.php": rename(/tmp/class_index.phpwF4mII,/var/www/html/var/cache/dev/class_index.php): Permission denied in /var/www/html/vendor/symfony/filesystem/Filesystem.php:320
Stack trace:
#0 /var/www/html/vendor/symfony/filesystem/Filesystem.php(708): Symfony\Component\Filesystem\Filesystem->rename('/tmp/class_inde...', '/var/www/html/v...', true)
#1 /var/www/html/vendor/prestashop/autoload/src/LegacyClassLoader.php(160): Symfony\Component\Filesystem\Filesystem->dumpFile('/var/www/html/v...', '<?php return ar...')
#2 /var/www/html/vendor/prestashop/autoload/src/LegacyClassLoader.php(75): PrestaShop\Autoload\LegacyClassLoader->dumpClassIndex(Array)
#3 /var/www/html/vendor/prestashop/autoload/src/PrestashopAutoload.php(47): PrestaShop\Autoload\LegacyClassLoader->buildClassIndex(true)
#4 /var/www/html/vendor/prestashop/autoload/src/PrestashopAutoload.php(38): PrestaShop\Autoload\PrestashopAutoload->generateIndex()
#5 /var/www/html/vendor/prestashop/autoload/src/Autoloader.php(77): PrestaShop\Autoload\PrestashopAutoload->PrestaShop\Autoload\{closure}()
#6 /var/www/html/config/config.inc.php(69): PrestaShop\Autoload\Autoloader->load('Tools')
#7 /var/www/html/index.php(20): require_once('/var/www/html/c...')
#8 {main}
  thrown in /var/www/html/vendor/symfony/filesystem/Filesystem.php on line 320