Error after upgrading to 2.4.5

[apelix]

I try to upgrade magento from version 2.4.3 -> 2.4.5 , but I receive these errors after upgrade:

bin/magento setup:upgrade

Class 'Zend\Mime\Mime' not found#0 /var/www/magento2/vendor/magento/framework/Code/Generator/EntityAbstract.php(366): ReflectionParameter->getDefaultValue()

I seen also this error:

bin/magento setup:upgrade

Interface "Zend\Stdlib\JsonSerializable" not found#0 /var/www/magento2/vendor/composer/ClassLoader.php(571): include()

I tryed different scenarios from 2.4.3-p2 to 2.4.4 and to 2.4.5 and 2.4.5-p1, but always same problem. Caches are cleared server rebooted, but I have always same errors. How to fix this problem  ?

[johnwebdes40a5]

Hello @apelix 

Indicates that Magento is trying to use the Zend_Mime class, but it can't find it. This could be caused by several factors, such as missing dependencies, issues with autoloading, or incompatible library versions.

composer require zendframework/zend-mime
php bin/magento cache:flush
php bin/magento setup:di:compile

Ensure Zend Framework Dependencies Are Installed

Magento 2 relies on certain Zend Framework packages. The Zend\Stdlib\JsonSerializable interface is part of the zendframework/zend-stdlib package.

composer require zendframework/zend-stdlib

​Hope it helps ! 

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