Stripe inline form does not appear

Question

I have the code below. If I throw it on one page, a button will appear, and I will see it through the developer tools. On another page, the button is not displayed, and dev tools show a script tag that is not on the form. What could be the reason for this?

        <form action="" method="POST">
            <script src="https://checkout.stripe.com/checkout.js" class="stripe-button"
                    data-key="sss"
                    data-amount="999"
                    data-name="sss"
                    data-description="Widget"
                    data-image="/img/documentation/checkout/marketplace.png"
                    data-locale="auto">
            </script>
        </form>