Screenshots might help, but I have the felling this is due to changes in ACF the third party plugins have not kept up with.
The problems could also be a compatibility issue with PHP7, was this update recent? This could also be the cause of some issues, but I don’t know since I don’t have any sites running on 7. As far as I know ACF works and plays well with PHP 7, at least that’s what I’m told by people that have tried it.
The first thing you’re going to need to do is to disable other plugins and see if the errors still exist or if they go away, maybe change themes as well.
