Yes I’m at version 1.4 for WP-Rollback and version 4.6.1 for WordPress.
Thanks for your reply.
I tried deactivating all plugins but it still not work.
I have only four plugins which are WP Rollback, TinyMCE Advanced, Polylang and Cryout Serious Theme Settings. I tried rollback on “Nirvana” theme (which is my actual theme) but also on “Twenty Sixteen”.
I got lucky because they just updated Nirvana theme so I do not need a rollback anymore. But I will keep answering your questions to fix this issue for the next time 🙂