Authentication error when logging in after updating PrestaShop Marketplace in your Back Office

[Themes]

Today I received updates for the Newsletter and PrestaShop Marketplace in your Back Office. The Newsletter update installed successfully, but the Marketplace update threw an error and crashed the shop — it only worked in debug mode.

I manually deleted the /dev and /prod folders, and now the shop loads again. However, it's no longer possible to log into customer accounts or create new ones — it shows an authentication error related to the password and email fields.

What should I do? I uninstalled the PrestaShop Marketplace in your Back Office and manually uploaded a downloaded version — that part worked, but the login and account creation issues persist. Please help.

Prestashop 8.2.1

 

Edited November 10 by Themes
title (see edit history)