Having problems after updating to Enfold 3.6? Please read this first!

if you’re getting Error 500 / PHP fatal errors after updating Enfold to 3.6, try the following before creating a new thread:

HTTP Error 500
– Enable WP_DEBUG in wp-config.php (this will make errors messages appear instead of Error 500):

define('WP_DEBUG', true);

Cannot redeclare av_mailchimp_check()
If you’re updating via FTP, make sure you’re completely replacing the old enfold folder with the new one, sometimes FTP clients will “merge” the folders, this results in deprecated files (helper-mailchimp.php) surviving the update which may lead to this error.

Call to undefined function avia_header_class()
This is most likely caused because you’re using a custom child theme header.php (which has a deprecated function name) make sure to update line 12:

$filterable_classes = avia_header_class( avia_header_class_string() );

To:

$filterable_classes = avia_header_class_filter( avia_header_class_string() );