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 l.*, ls....') #2 /var/www/html/classes/Language.php(1049): DbCore->executeS('SELECT l.*, ls....') #3 /var/www/html/config/config.inc.php(154): LanguageCore::loadLanguages() #4 /var/www/html/index.php(27): require('/var/www/html/c...') #5 {main} thrown in /var/www/html/classes/db/DbPDO.php on line 136