Customer Password Reset doesn't work

[Sgarbo]

Hello! 
 

as the title suggests, I have a problem that I cannot solve in any way. Many have problems with the reset but usually the problem I found in the forum is related to the link (not present in the mail or with a too short expiration). In my case the problem is elsewhere but I can't find it ...

In short, the email is sent correctly. The link is there and it works. You get to the page where you can enter the new password. I insert it and ... nothing. It is as if the password were not changed in the database. It always remained the old one.

I don't know if it has anything to do with it (I don't think so): I tried to activate debug mode before clicking on the "confirm" button to change the password.

The only error detected is this (but I get this error even when I open any category):

ContextErrorException
Notice: Undefined offset: 0
in ProductPresenter.php line 565

public function addAttributesSpecificReferences(array $product, array $presentedProduct)
    {
	    $presentedProduct['specific_references'] = array_slice($product['attributes'], 0)[0];
        //this attributes should not be displayed in FO
        unset(
            $presentedProduct['specific_references']['id_attribute'],
            $presentedProduct['specific_references']['id_attribute_group'],
            $presentedProduct['specific_references']['name'],
            $presentedProduct['specific_references']['group'],
            $presentedProduct['specific_references']['reference']
        );
        //if the attribute's references doesn't exist then get the product's references or unset it
        foreach ($presentedProduct['specific_references'] as $key => $value) {
            if (empty($value)) {
                $translatedKey = $this->getTranslatedKey($key);
                unset($presentedProduct['specific_references'][$key]);
                if (!empty($product[$key])) {
                    $presentedProduct['specific_references'][$translatedKey] = $product[$key];
                }
            }
        }
        if (empty($presentedProduct['specific_references'])) {
            unset($presentedProduct['specific_references']);
        }

        return $presentedProduct;
    }

Cosa posso fare?? 🤕