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(663): DbCore->query('SELECT *\nFROM `...') #2 /var/www/html/src/Adapter/EntityMapper.php(76): DbCore->getRow('SELECT *\nFROM `...') #3 /var/www/html/classes/ObjectModel.php(265): PrestaShop\PrestaShop\Adapter\EntityMapper->load(2, NULL, Object(Language), Array, 1, true) #4 /var/www/html/classes/Tools.php(658): ObjectModelCore->__construct(2) #5 /var/www/html/classes/Dispatcher.php(242): ToolsCore::switchLanguage() #6 /var/www/html/classes/Dispatcher.php(207): DispatcherCore->__construct(Object(Symfony\Component\HttpFoundation\Request)) #7 /var/www/html/index.php(28): DispatcherCore::getInstance() #8 {main} thrown in /var/www/html/classes/db/DbPDO.php on line 136