update: to fix the HSTS error just set a single php for all sites, because the error appeared with different php for each site. As for the database connection error, when scanning the files, the terminal returns me these errors:
192:~ pillo$ php /Applications/MAMP/htdocs/owncloud/occ files:scan pillaccio
An unhandled exception has been thrown:
Doctrine\DBAL\DBALException: Failed to connect to the database: An exception occurred in driver: SQLSTATE[HY000] [2002] No such file or directory in /Applications/MAMP/htdocs/owncloud/lib/private/DB/Connection.php:62
Stack trace:
#0 /Applications/MAMP/htdocs/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(475): OC\DB\Connection->connect()
#1 /Applications/MAMP/htdocs/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(437): Doctrine\DBAL\Connection->getDatabasePlatformVersion()
#2 /Applications/MAMP/htdocs/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(379): Doctrine\DBAL\Connection->detectDatabasePlatform()
#3 /Applications/MAMP/htdocs/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(844): Doctrine\DBAL\Connection->getDatabasePlatform()
#4 /Applications/MAMP/htdocs/owncloud/lib/private/DB/Connection.php(148): Doctrine\DBAL\Connection->setTransactionIsolation(2)
#5 /Applications/MAMP/htdocs/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/DriverManager.php(262): OC\DB\Connection->__construct(Array, Object(Doctrine\DBAL\Driver\PDO\MySQL\Driver), Object(Doctrine\DBAL\Configuration), Object(Doctrine\Common\EventManager))
#6 /Applications/MAMP/htdocs/owncloud/lib/private/DB/ConnectionFactory.php(139): Doctrine\DBAL\DriverManager::getConnection(Array, Object(Doctrine\DBAL\Configuration), Object(Doctrine\Common\EventManager))
#7 /Applications/MAMP/htdocs/owncloud/lib/private/Server.php(552): OC\DB\ConnectionFactory->getConnection(‘mysql’, Array)
#8 /Applications/MAMP/htdocs/owncloud/lib/composer/pimple/pimple/src/Pimple/Container.php(122): OC\Server->OC{closure}(Object(OC\Server))
#9 /Applications/MAMP/htdocs/owncloud/lib/private/AppFramework/Utility/SimpleContainer.php(108): Pimple\Container->offsetGet(‘DatabaseConnect…’)
#10 /Applications/MAMP/htdocs/owncloud/lib/private/ServerContainer.php(86): OC\AppFramework\Utility\SimpleContainer->query(‘DatabaseConnect…’)
#11 /Applications/MAMP/htdocs/owncloud/lib/private/Server.php(1260): OC\ServerContainer->query(‘DatabaseConnect…’)
#12 /Applications/MAMP/htdocs/owncloud/lib/private/Server.php(424): OC\Server->getDatabaseConnection()
#13 /Applications/MAMP/htdocs/owncloud/lib/composer/pimple/pimple/src/Pimple/Container.php(122): OC\Server->OC{closure}(Object(OC\Server))
#14 /Applications/MAMP/htdocs/owncloud/lib/private/AppFramework/Utility/SimpleContainer.php(108): Pimple\Container->offsetGet(‘AppConfig’)
#15 /Applications/MAMP/htdocs/owncloud/lib/private/ServerContainer.php(86): OC\AppFramework\Utility\SimpleContainer->query(‘AppConfig’)
#16 /Applications/MAMP/htdocs/owncloud/lib/private/Server.php(1190): OC\ServerContainer->query(‘AppConfig’)
#17 /Applications/MAMP/htdocs/owncloud/lib/private/Server.php(607): OC\Server->getAppConfig()
#18 /Applications/MAMP/htdocs/owncloud/lib/composer/pimple/pimple/src/Pimple/Container.php(122): OC\Server->OC{closure}(Object(OC\Server))
#19 /Applications/MAMP/htdocs/owncloud/lib/private/AppFramework/Utility/SimpleContainer.php(108): Pimple\Container->offsetGet(‘AppManager’)
#20 /Applications/MAMP/htdocs/owncloud/lib/private/ServerContainer.php(86): OC\AppFramework\Utility\SimpleContainer->query(‘AppManager’)
#21 /Applications/MAMP/htdocs/owncloud/lib/private/Server.php(1458): OC\ServerContainer->query(‘AppManager’)
#22 /Applications/MAMP/htdocs/owncloud/lib/private/legacy/app.php(344): OC\Server->getAppManager()
#23 /Applications/MAMP/htdocs/owncloud/lib/private/legacy/app.php(108): OC_App::getEnabledApps()
#24 /Applications/MAMP/htdocs/owncloud/lib/base.php(591): OC_App::loadApps(Array)
#25 /Applications/MAMP/htdocs/owncloud/lib/base.php(1060): OC::init()
#26 /Applications/MAMP/htdocs/owncloud/console.php(74): require_once(’/Applications/M…’)
#27 /Applications/MAMP/htdocs/owncloud/occ(11): require_once(’/Applications/M…’)
#28 {main}192:~ pillo$
Thanks for your help