WordPress SEO was updated to version 2.1.1, from version 2.1. Changelog:
- Fixes a bug where the JSON+LD output was outputted twice when company or person info wasn’t set.
- Fixes a compatibility issue with Video SEO and WooCommerce SEO add-ons causing WSOD on the frontend for video’s and WooCommerce products.
- Fixes a compatibility issue with BBPress caused by hooking current_user_can too early.