WordPress 5.2 warning about latest Enfold update 4.5.7

Warning message sent via email from WordPress:

Hi there!

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with your theme, Enfold.

Error Details
=============
An error of type E_ERROR was caused in line 361 of the file /var/sites/l/domain.com/public_html/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/template-builder.class.php. Error message: Uncaught Error: Class ‘ShortcodeHelper’ not found in /var/sites/l/domain.com/public_html/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/template-builder.class.php:361
Stack trace:
#0 /var/sites/l/domain.com/public_html/wp-includes/class-wp-hook.php(286): AviaBuilder->handler_wp_head(”)
#1 /var/sites/l/domain.com/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /var/sites/l/domain.com/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /var/sites/l/domain.com/public_html/wp-includes/general-template.php(2746): do_action(‘wp_head’)
#4 /var/sites/l/domain.com/public_html/wp-content/themes/enfold/header.php(77): wp_head()
#5 /var/sites/l/domain.com/public_html/wp-includes/template.php(722): require_once(‘/var/sites/l/li…’)
#6 /var/sites/l/domain.com/public_html/wp-includes/template.php(671): load_template(‘/var/sites/l/li…’, true)
#7 /var/sites/l/domain.com/public_html/wp-includes/g