My WordPress admin has stopped working. This is running with WooCommerce. On the Customize Appearance > WooCoomerce > Store Notice, I tried to set the Store Notice to Off. I got this error message:

changeset_post_save_failure() 

I first tried to deactivate the plugins but they still remain activated. I am unable to edit any page or post.

As of a day before, I was still able to add a page. I remember this was after I had updated the plugins.