Forms don’t render

I ended up with a blank screen on wp-admin after restoring the database. Was quite puzzling til I tried to rename a mu-plugins folder in order to disable it and all came back to normal.

The folder had a function which corrected the following: after selecting an item in the form, some calculations showed up, but when changing the selection didn’t revert the calculations until I changed the “quantity” field. here is the code:

<?php

add_action('wp_footer', 'wpmudev_fix_form_calculations', 9999);
function wpmudev_fix_form_calculations(){
	global $post;
	if ( is_a( $post, 'WP_Post' ) && !has_shortcode($post->post_content, 'forminator_form') ) {
		return;
	}
	?>
	<script type="text/javascript">
	jQuery(document).ready(function($){
		$(document).on("after.load.forminator", function (e, id) {
			if( id == 3206 ){
				$('#select-1 select').on('select2:select', function() { 
					setTimeout(function(){
						$('#number-1 input').change();
					},10);
				});
			}
		});
	});
	</script>
	<?php
}

I notice that the issue is back now that the “mu-plugins” folder is disabled.

kind regards
Rod