Warning: PDO::query(): MySQL server has gone away in /var/www/html/classes/db/DbPDO.php on line 165

Warning: PDO::query(): Error reading result set's header in /var/www/html/classes/db/DbPDO.php on line 165

Fatal error: Uncaught PrestaShopException: Link to database cannot be established: SQLSTATE[HY000] [2002] Connection refused in /var/www/html/classes/db/DbPDO.php:136 Stack trace: #0 /var/www/html/classes/db/Db.php(379): DbPDOCore->connect() #1 /var/www/html/classes/db/Db.php(613): DbCore->query('SELECT m.page, ...') #2 /var/www/html/classes/Dispatcher.php(643): DbCore->executeS('SELECT m.page, ...') #3 /var/www/html/classes/Dispatcher.php(249): DispatcherCore->loadRoutes() #4 /var/www/html/classes/Dispatcher.php(207): DispatcherCore->__construct(Object(Symfony\Component\HttpFoundation\Request)) #5 /var/www/html/index.php(28): DispatcherCore::getInstance() #6 {main} thrown in /var/www/html/classes/db/DbPDO.php on line 136