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  On 10/11/2021 at 12:35 PM, GuidoSc said:

Dear all,

for who is still looking for a solution, thanks to the support received, the following solved my issue:

replace core.js file from Prestashop 1.7.7.7 or other previous version.
Themes ->core.js

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Worked for me, thank you very much, You saved my life too!