Hello There,
I have deleted the Cornerstone folder in the plugins section. I have re installed it and now the backend is accessible in your dev site. I can see that you have several modifications in your child theme. Just like this in _brand.php
<?php
// =============================================================================
// VIEWS/GLOBAL/_BRAND.PHP
// -----------------------------------------------------------------------------
// Outputs the brand.
// =============================================================================
$site_name = get_bloginfo( 'name' );
$site_description = get_bloginfo( 'description' );
$logo = x_make_protocol_relative( x_get_option( 'x_logo' ) );
$site_logo = '<img src="' . $logo . '" alt="' . $site_description . '">';
?>
<a href="<?php echo home_url( '/' ); ?>" class="<?php x_brand_class(); ?>" title="<?php echo $site_description; ?>">
<?php echo ( $logo == '' ) ? $site_name : $site_logo; ?>
</a>
<span class="custom-text logo-pointer" style="font-size:27px"><a href="https://www.bustersvisionregistry.org/"><font color="#000"></a></span>
The correct one should be:
<?php
// =============================================================================
// VIEWS/GLOBAL/_BRAND.PHP
// -----------------------------------------------------------------------------
// Outputs the brand.
// =============================================================================
$site_name = get_bloginfo( 'name' );
$site_description = get_bloginfo( 'description' );
$logo = x_make_protocol_relative( x_get_option( 'x_logo' ) );
$site_logo = '<img src="' . $logo . '" alt="' . $site_description . '">';
?>
<a href="<?php echo home_url( '/' ); ?>" class="<?php x_brand_class(); ?>" title="<?php echo $site_description; ?>">
<?php echo ( $logo == '' ) ? $site_name : $site_logo; ?>
</a>
<span class="custom-text logo-pointer" style="font-size:27px; color: #000;"><a href="https://www.bustersvisionregistry.org/">Your Text Here</a></span>
I also noticed that you are using X 4.6.4 and yet most of the files and folders from X5.x.x is present. Please delete your X theme and re install a fresh copy. You can download it in your dashboard(https://theme.co/apex/dashboard). This is the only way we can resolve any issues. Please do not worry about your previous modifications, we can add it back later on since all of the changes will take place in your dev or staging site.
Please let us know how it goes.