Recently updated PHP and WP – Website Crash when trying to load theme

I received the following error after updating PHP to 7 and WP. The old Enfold on the site was 3.0.4 (I beleive). I am trying to update the Enfold theme. I thought about removing the theme and re-installing it, but fear that I will loose all the customization on the site.
Error –

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Fatal error: Uncaught Error: Function name must be a string in /data/6/5/45/31/5208846/user/6252601/htdocs/wp-content/themes/enfold/framework/php/class-htmlhelper.php:222 Stack trace: #0 /data/6/5/45/31/5208846/user/6252601/htdocs/wp-content/themes/enfold/framework/php/class-htmlhelper.php(131): avia_htmlhelper->render_single_element(Array) #1 /data/6/5/45/31/5208846/user/6252601/htdocs/wp-content/themes/enfold/framework/php/class-adminpages.php(205): avia_htmlhelper->create_container_based_on_slug(Array, ‘avia_active_con…’) #2 /data/6/5/45/31/5208846/user/6252601/htdocs/wp-includes/class-wp-hook.php(287): avia_adminpages->render_page(”) #3 /data/6/5/45/31/5208846/user/6252601/htdocs/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(”, Array) #4 /data/6/5/45/31/5208846/user/6252601/htdocs/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #5 /data/6/5/45/31/5208846/user/6252601/htdocs/wp-admin/admin.php(254): do_action(‘toplevel_page_a…’) #6 {main} thrown in /data/6/5/45/31/5208846/user/6252601/htdocs/wp-content/themes/enfold/framework/php/class-htmlhelper.php on line 222
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• This topic was modified 5 years, 10 months ago by joshinkell. Reason: website crash!