This is basically the same as Make the block title required and allow it to be hidden for D8, but applied to both block titles and layout page titles.
D7 (<none> required to hide title):

D8 (checkbox that toggles visibility of title):

GitHub Issue #:
692
Recent comments
So the implication is that another module is causing the trouble. Now for the slow process of elimination... Sounds plausible. And good luck with digging...
How to troubleshoot interactive image cropping modules?
I’ve just set up a clean install in MAMP and Focal Point works fine. *sighs So the implication is that another module is causing the trouble. Now for the slow process of elimination...
How to troubleshoot interactive image cropping modules?
Here’s the edit screen with the Focal Point instructions below: If I click on the Preview link, I get this: And no errors in the console.
How to troubleshoot interactive image cropping modules?