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I tried to upgrade magento from 2.3.5-p2 to 2.4.0 but I got an error in the frontend, so I changed back to 2.3.5-p2, deleted my whole vendor folder and executed composer update again.

But now my frontend does not work anymore and I get

There has been an error processing your request Class
Magento\Csp\Model\BlockCache does not exist

If I execute php bin/magento setup:upgrade then I get There are no commands defined in the "setup" namespace.

And if I execute php bin/magento list then I get:

Magento CLI 2.3.5-p1

Usage: command [options] [arguments]

Options: -h, --help Display this help message -q, --quiet Do not output any message -V, --version Display this application version --ansi Force ANSI output --no-ansi Disable ANSI output -n, --no-interaction Do not ask any interactive question -v|vv|vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug

Available commands: help Displays help for a command list Lists commands

In ServiceManager.php line 1129:

An abstract factory could not create an instance of magentosetupconsolecommanddbstatuscommand(alias: Magento\Setup\Console\Command\DbStatusCommand).

In ServiceManager.php line 940:

An exception was raised while creating "Magento\Setup\Console\Command\DbStatusCommand"; no instance returned

In ClassReader.php line 26:

Class Vertex\Tax\Setup\Schema\Triggers\MigrateVertexInvoiceSent does not exist

[company@company company.de]$ php bin/magento setup:upgrade

There are no commands defined in the "setup" namespace.

So I deleted my setup folder and copied another one from a working magento 2 copy, but it still fails with the same error.

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I changed my PHP version via cPanel from 7.3 to 7.2 for the project and back to 7.3, then it worked suddenly. Not sure why.

Be careful, I think magento or the cPanel changed permissions of my magento folder and of the .htaccess file in the magento root. Check the permission there too!

I have set the permission of my project folder to 755 with chmod 755 project-folder

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  • You should NOT use PHP 7.3.x. As official docs say ( devdocs.magento.com/guides/v2.4/install-gde/… ), Magento 2.4.0 is developed and tested on PHP 7.4.x. PHP 7.3.x should be only used in the upgrading process.
    – KaMZaTa
    Commented Sep 13, 2020 at 11:09
  • Yes, but I have bugs with PHP 7.4 and customers cant login anymore.
    – Black
    Commented Sep 14, 2020 at 11:09

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