Problema aggiornamento a PS 1.7.7.2

[DARKF3D3]

Ho provato ad aggiornare da Prestashop 1.7.4.2 a PS 1.7.7.2 usando l'ultima versione di one click upgrade.

Inizialmente la procedura sembra andare a buon fine, però dopoil messaggio dell'aggiornamento del database: "Database upgrade OK", mostra i seguenti avvisi:
Avviso rilevato durante l'aggiornamento.
[INTERNAL] /var/www/vhosts/nomesito.it/httpdocs/override/classes/Cart.php line 0 - Declaration of Cart::getProducts($refresh = false, $id_product = false, $id_country = NULL, $fullInfos = true) should be compatible with CartCore::getProducts($refresh = false, $id_product = false, $id_country = NULL, $fullInfos = true, bool $keepOrderPrices = false)
[INTERNAL] /var/www/vhosts/nomesito.it/httpdocs/override/classes/Cart.php line 0 - Declaration of Cart::deleteProduct($id_product, $id_product_attribute = NULL, $id_customization = NULL, $id_address_delivery = 0, $auto_add_cart_rule = false) should be compatible with CartCore::deleteProduct($id_product, $id_product_attribute = 0, $id_customization = 0, $id_address_delivery = 0, bool $preserveGiftsRemoval = true)
[INTERNAL] /var/www/vhosts/nomesito.it/httpdocs/override/classes/Cart.php line 0 - Declaration of Cart::getOrderTotal($with_taxes = true, $type = Cart::BOTH, $products = NULL, $id_carrier = NULL, $use_cache = true) should be compatible with CartCore::getOrderTotal($withTaxes = true, $type = Cart::BOTH, $products = NULL, $id_carrier = NULL, $use_cache = false, bool $keepOrderPrices = false)
[INTERNAL] /var/www/vhosts/nomesito.it/httpdocs/override/classes/Cart.php line 0 - Declaration of Cart::getPackageShippingCost($id_carrier = NULL, $use_tax = true, ?Country $default_country = NULL, $product_list = NULL, $id_zone = NULL) should be compatible with CartCore::getPackageShippingCost($id_carrier = NULL, $use_tax = true, ?Country $default_country = NULL, $product_list = NULL, $id_zone = NULL, bool $keepOrderPrices = false)

========================
========================

errori
SQL 1.7.5.0 1071 in ALTER TABLE `ps_customer` CHANGE `company` `company` VARCHAR(255), CHANGE `email` `email` VARCHAR(255) NOT NULL, CHANGE `passwd` `passwd` VARCHAR(255) NOT NULL: Specified key was too long; max key length is 1000 bytes
SQL 1.7.5.0 1071 in ALTER TABLE `ps_employee` CHANGE `firstname` `firstname` VARCHAR(255) NOT NULL, CHANGE `email` `email` VARCHAR(255) NOT NULL, CHANGE `passwd` `passwd` VARCHAR(255) NOT NULL, CHANGE `lastname` `lastname` VARCHAR(255) NOT NULL: Specified key was too long; max key length is 1000 bytes
SQL 1.7.7.0 1071 in ALTER TABLE `ps_shop_url` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci: Specified key was too long; max key length is 767 bytes
SQL 1.7.7.0 1146 in ALTER TABLE `ps_statssearch` CHANGE `keywords` `keywords` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL: Table 'tazze_store.ps_statssearch' doesn't exist
[ERROR] PHP 1.7.7.1 /* PHP:ps_1771_update_customer_note(); */
[INTERNAL] /var/www/vhosts/nomesito.it/httpdocs/modules/lgsitemaps/classes/LGTools.php line 0 - Declaration of LGTools::getMediaServer($filename, $id_shop = NULL) must be compatible with ToolsCore::getMediaServer(string $filename): string

 

Terminata la procedura il backoffice non è più accessibile e attivando la modalità backup questo è l'errore mostrato:

 

Sapete da cosa può essere causato?