Error public function Alma pay

-- HikaShop version -- : 5.0.4
-- Joomla version -- : 5.1.0
-- PHP version -- : 8.2

When I activate the alma pay plugin the following 500 error occurs.
I downloaded the plugin again from the link in the purchase order and the result was the same.
I think the error comes from the version of Alma that does not adapt to J! 5.

Solved,
thank you for responding so quickly.

Hi Nicolas,
In the purchasing process, when we select the payment option "AlmaPay" and then click the "pay" button, instead of redirecting us to AlmaPay, a pop-up window appears with the text - the "purchase_amount" field needs to be an integer "double" found -

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