
Module conflicts breaking the store after a PrestaShop version upgrade (1.7→ 8.x, 9.X)
The upgrade finishes. Green tick, no warnings, everything looks fine. Then you open the shop and the size chart has vanished from every product page, or the Module Manager loads as a white rectangle, or a customer emails to say the pay button does nothing. We run into this constantly on stores coming off PrestaShop …








