Why did ajax stop working in the contact form 7 plugin?

Question

JavaScript

A feedback form was created on the site using the contact form 7 plugin, the form is displayed in a modal window. It stopped working correctly,
when you click the "send" button, instead of the ajax loader, the entire page is reloaded and the modal window is closed. When called again, a window pops up with a form with messages about filling errors, etc. Please help me understand what is blocking ajax.

Answer 1

Did it work before the modal window was installed?
---

<input alt="#TB_inline?height=400&amp;width=500&amp;inlineId=УНИКАЛЬНОЕ_ИД" class="thickbox" type="button" value="ИМЯ" />

<div id="ТО_ЖЕ_УНИКАЛЬНОЕ_ИД" style="display:none">
    <?php echo do_shortcode( '[contact-form-7 id="12345" title="Order"]' ); ?>
  </div>