Magento 2 – Express Checkout redirect homepage

I use Magento 2.3.1 version and I setup Website Payments Pro Hosted Solution (Includes Express Checkout).

I have a problem when a customer pay the order with Card as a quest from mobile.

After the order is complete the store is redirect to the homepage and I have this message: “Invalid Form Key. Please refresh the page”.

Anyone have any idea why?

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