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php - Error - Attempted to load interface "SessionInterface" while trying to enter Categories in admin panel Prestashop 1.7.6.5

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I have made many changes in my Prestashop and don't know when my problem appeared. So when I try to enter categories or invoices in back office I get error like on image and text below.

Attempted to load interface "SessionInterface" from namespace "PrestaShop\PrestaShop\Core\Session". Did you forget a "use" statement for e.g. "Symfony\Component\HttpFoundation\Session\SessionInterface" or "PrestaShop\PrestaShop\Core\Session\SessionInterface"?

error view 1 error view 2

Does anybody know what can cause that and what is solution for this? Really appreciate any help

Thank you in advance

Undefined asked

2021-09-11

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925

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Answer

Solution:

Your error is pointing to the file "/classes/CustomerSession.php" However the error pointed is not an issue with this file. Your error might be a cache issue. Try to delete

/yourstore/var/cache/dev and/yourstore/var/cache/prod

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113

votes

Answer

Solution:

Try to update to version 1.7.7.* I found that file in this version: https://github.com/PrestaShop/PrestaShop/blob/1.7.7.x/src/Core/Session/SessionInterface.php

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Date the issue was resolved:

2021-09-11

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