Calculation not working in front office

Hello,
critical problem in my site please need your help

my customer can’t calculate the price when clicking on “calculate button” for all products using UNICPO calculation price is always 0.00$ , but in back office it works for me

everything works perfectly since months, but today i don’t know what happend

product exemple –> https://cryptorecharge.org/produit/usdt/

thank you for your precious help

best regards

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