WooCommerce payment form and shipping form not showing, how to fix?

Question

WordPress

Good day, I have an online store on WooCommerce, the problem is: the delivery and payment form is not displayed on the checkout page, I checked the code, everything seems to be in place

<div class="woocommerce-billing-fields__field-wrapper">
<?php
  $fields = $checkout->get_checkout_fields( 'billing' );

  foreach ( $fields as $key => $field ) {
    woocommerce_form_field( $key, $field, $checkout->get_value( $key ) );
  }
  ?>
</div>

but when I get to the checkout page, this form is not there, I check it with the code inspector and it simply shows:

<div class="woocommerce-billing-fields__field-wrapper"></div>

What could it be? Thanks in advance for your reply

Answer 1

Install Query Monitor, look at php errors, requests.
print print_r($fields)