Empty action in the form of a detailed order page (PC user). Where to look?

Online store on 1-C Bitrix. Immediately after placing the order with a payment online no problem (i.e. the payment method works, the payment goes to the Bank, etc.).But if the order is not paid at once, the "Pay" button in the order window (the one in the user's personal account) does not work. When it is clicked on ajax, it opens another div with another payment button, and when clicking on the latter takes you to the orders list in the CP and everything.
Below code is from a browser, it confuses me a blank action on the form but where to look and what to edit I do not know. Please help.

<div class="row sale-order-detail-payment-options-methods-template">
 <span class="sale-paysystem-close active-button">
 <span class="sale-paysystem-close-item sale-order-payment-cancel"></span>
 <div class="col">
 <form action="" method="get">
 <input type="SUBMIT" value="Pay">
 <!--<a class="sale-order-payment-cancel">-->
April 3rd 20 at 18:37
0 answer

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