Hello @JBW I have downgraded to php 7.1
PHP Fatal error: Uncaught Symfony\Component\Cache\Exception\InvalidArgumentException: Cache key must be string, "NULL" given in /home/nginx/domains/mydomain.com/public/vendor/symfony/symfony/src/Symfony/Component/Cache/CacheItem.php:156
Stack trace:
#0 /home/nginx/domains/mydomain.com/public/vendor/symfony/symfony/src/Symfony/Component/Cache/Traits/AbstractTrait.php(235): Symfony\Component\Cache\CacheItem::validateKey(NULL)
#1 /home/nginx/domains/mydomain.com/public/vendor/symfony/symfony/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php(152): Symfony\Component\Cache\Adapter\AbstractAdapter->getId(NULL)
#2 /home/nginx/domains/mydomain.com/public/src/Core/Localization/CLDR/DataLayer/LocaleCache.php(82): Symfony\Component\Cache\Adapter\AbstractAdapter->getItem(NULL)
#3 /home/nginx/domains/mydomain.com/public/src/Core/Data/Layer/AbstractDataLayer.php(90): PrestaShop\PrestaShop\Core\Localization\CLDR\DataLayer\LocaleCache->doRead(NULL)
#4 /home/nginx/domains/mydomain.com/public/src/Core/Localization/ in /home/nginx/domains/mydomain.com/public/vendor/symfony/symfony/src/Symfony/Component/Cache/CacheItem.php on line 156
[INTERNAL] /home/nginx/domains/mydomain.com/public/admin321/autoupgrade/latest/install/upgrade/php/migrate_tabs_17.php line 60 - Symfony\Component\Debug\Exception\UndefinedMethodException: Attempted to call an undefined method named "resetCacheAccesses" of class "ProfileCore". #0 [internal function]: migrate_tabs_17() #1 /home/nginx/domains/mydomain.com/public/modules/autoupgrade/classes/UpgradeTools/CoreUpgrader/CoreUpgrader.php(395): call_user_func_array('migrate_tabs_17', Array) #2 /home/nginx/domains/mydomain.com/public/modules/autoupgrade/classes/UpgradeTools/CoreUpgrader/CoreUpgrader.php(360): PrestaShop\Module\AutoUpgrade\UpgradeTools\CoreUpgrader\CoreUpgrader->runPhpQuery('1.7.0.0', '/* PHP:migrate_...') #3 /home/nginx/domains/mydomain.com/public/modules/autoupgrade/classes/UpgradeTools/CoreUpgrader/CoreUpgrader.php(284): PrestaShop\Module\AutoUpgrade\UpgradeTools\CoreUpgrader\CoreUpgrader->runQuery('1.7.0.0', '/* PHP:migrate_...') #4 /home/nginx/domains/mydomain.com/public/modules/autoupgrade/classes/UpgradeTools/CoreUpgrader/CoreUpgrader17.php(55): PrestaShop\Module\AutoUpgrade\UpgradeTools\CoreUpgrader\CoreUpgrader->upgradeDb('1.6.1.28') #5 /home/nginx/domains/mydomain.com/public/modules/autoupgrade/classes/UpgradeTools/CoreUpgrader/CoreUpgrader.php(101): PrestaShop\Module\AutoUpgrade\UpgradeTools\CoreUpgrader\CoreUpgrader17->upgradeDb('1.6.1.28') #6 /home/nginx/domains/mydomain.com/public/modules/autoupgrade/classes/TaskRunner/Upgrade/UpgradeDb.php(41): PrestaShop\Module\AutoUpgrade\UpgradeTools\CoreUpgrader\CoreUpgrader->doUpgrade() #7 /home/nginx/domains/mydomain.com/public/admin321/autoupgrade/ajax-upgradetab.php(53): PrestaShop\Module\AutoUpgrade\TaskRunner\Upgrade\UpgradeDb->run() #8 {main}