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(Solved) The PS_ADMIN_DIR constant is missing

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Beste mede PrestaShoppers,


Ik probeer mijn PS te updaten. Hiervoor schijn ik de gratis module "1-Click Upgrade - Autoupgrade" te moeten downloaden en installeren. Echter krijg ik hierbij de foutmelding "Error installing module: This version op PrestaShop cannot be upgraded: The PS_ADMIN_DIR constant is missing." 


Wie kan mij hier mee helpen?


Ik wil graag naar versie


Alvast heel erg bedankt,

Met vriendelijke groet,




Edited by LeukvanLieke (see edit history)

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