I'm trying to automatically close the modal after submitting the data to Mailchimp. But that's where the above issue occurs. I tried several existing solutions here, but they didn't seem to fix the issue. I have firing bootstrap events but still no use. I have pasted below the modal with the mailchimp api code (I've hidden some parts for privacy concerns) with the external bootstrap and jquery links. Please help.
//functions.php
function front_page_popup() { ?>
<!-- Modal -->
<div id="newsletter" class="modal fade bd-example-modal-lg rounded-0 mt-3 pr-0" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="container pt-5 px-5 pb-0">
<div class="d-flex justify-content-center mt-0">
<i class="fas fa-lightbulb fa-3x"></i>
</div>
<div class="d-flex justify-content-center my-2">
<h1 class="text-center"><strong>Subscribe for Weekly Goodies</strong></h1>
</div>
<div class="d-flex justify-content-center my-2">
<p class="text-secondary text-center">Proven Strategies To Earn Online Straight To Your Inbox.</p>
</div>
<div class="d-flex justify-content-center my-4">
<hr style="width: 75%; border-width: 2px;">
</div>
<div class="d-flex justify-content-center my-4">
<img class="w-25 h-50 rounded-circle" src="https://d1aettbyeyfilo.cloudfront.net/yoursolutions/6999175_1576332391276Thomas_Edison.jpg" alt="thomas edison">
<div class="d-flex flex-column bd-highlight my-auto ml-3">
<div class="p-2 bd-highlight">
<q><em class="text-secondary">Genius is one percent inspiration and ninety-nine percent perspiration.</em></q>
</div>
<div class="p-2 bd-highlight">
<p><strong>Thomas Edison</strong></p>
</div>
</div>
</div>
</div>
<div id="mc_embed_signup" class="container-fluid bg-light">
<form action="{hid--for--privacy--reasons}" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" target="_blank" class="needs-validation" novalidate>
<div class="form-row">
<div class="col">
<input type="text" name="FNAME" class="form-control form-control-lg mt-5 mb-2 mx-auto" style="width: 80%;" id="mce-FNAME" placeholder="First Name..." required>
<div class="invalid-feedback text-center">
Please provide your name.
</div>
</div>
</div>
<div class="form-row">
<div class="col mb-3">
<input type="email" name="EMAIL" class="form-control form-control-lg mt-3 mb-2 mx-auto" style="width: 80%;" id="mce-EMAIL" placeholder="Email Address..." required>
<div class="invalid-feedback text-center">
Please provide your email address.
</div>
</div>
</div>
<div id="mce-responses" class="clear">
<div class="text-center" id="mce-error-response" style="display:none; color: red;"></div>
<div class="text-center" id="mce-success-response" style="display:none; color: green;"></div>
</div>
<button id="mc-embedded-subscribe" class="btn btn-primary btn-lg btn-block mt-2 mb-5 mx-auto" style="width: 80%; background-color: #9661f3; border-color: #9661f3;" type="submit">
<strong>Subscribe Now</strong>
</button>
</form>
<script type='text/javascript' src='//s3.amazonaws.com/downloads.mailchimp.com/js/mc-validate.js'>
</script>
<script type='text/javascript'>
(function($) {
window.fnames = new Array();
window.ftypes = new Array();
fnames[0]='EMAIL';
ftypes[0]='email';
fnames[1]='FNAME';
ftypes[1]='text';
$('#newsletter').modal('hide');
}
(jQuery));
var $mcj = jQuery.noConflict(true);
</script>
<!--End mc_embed_signup-->
</div>
</div>
</div>
</div>
<?php }
add_filter('wp_footer', 'front_page_popup');
below is the external links
//External links in functions.php
wp_deregister_script('jquery');
wp_enqueue_script('jquery', 'https://code.jquery.com/jquery-3.4.1.slim.min.js', array(), null, true);
wp_enqueue_script('bootstrap-js', get_stylesheet_directory_uri() . '/js/bootstrap.min.js', array('jquery'), '4.4.1', true);
