I get an error that says headers already sent and pluggable.php with WP Empire Builder
If you get an error similar to:
Warning: Cannot modify header information - headers already sent by (output started at /home/user/public_html/some-domain.com/wp-admin/includes/template.php:1657) in /home/user/public_html/some-domain/wp-includes/pluggable.php on line 866
... then this likely means that you have an older version of WP Empire Builder. Please find instructions on how to update to the latest version here.