I get this error when updating to Woocommerce 2.3.5 and cannot access the dashboard. I had to roll back to 2.2.11 to get access to dashboard again.
Fatal error: Cannot redeclare class WC_Email in /homepages/29/d378202308/htdocs/jewelboss/wp-content/plugins/woocommerce/includes/emails/class-wc-email.php on line 840
Please advise.