Ever since the 4.7 update I've had serious issues within my WP admin panel including:
1. Couldn't edit permalinks
2. Couldn't add URL links to text or images
3. Links to existing posts or pages disappeared
4. Couldn't add images or galleries (Nextgen or theme style ones)
I've had to disable the plugin for now as WP was unusable, but will definitely enable again on the next update.