Restaurant attachments not being able to move since wordpress 5.1.1

Now I cannot add a logo as hitting Select File does nothing

I cannot delete an image or re-order the logos

Plus the hours of operation, while I can enter hours, I cannot use the drop downs.

Here are a few more issues that we found looking at the site today.

I found the issue

There was this code in our functions.php file

//Defers Javascript

function defer_parsing_of_js($url)
{
    $st = microtime(true);

    if (false === strpos($url, '.js')) {
        vrc_log_elapsed_time($st, __FUNCTION__);
        return $url;
    }

    if (strpos($url, 'jquery.js')) {
        vrc_log_elapsed_time($st, __FUNCTION__);
        return $url;
    }

    vrc_log_elapsed_time($st, __FUNCTION__);
    return "$url' defer='defer";
}
add_filter('clean_url', 'defer_parsing_of_js', 11, 1);

Looks like the last developer tried deferring the JS and for some reason it effected the site negatively when WordPress was updated to version 5.1.1 but not on version 4.9.10