Sorry, I can't upload screenshots, as I somehow "solved" the problem:
- As for the screenshot, there was nothing to see: only the admin menu on the left and on top. Some text comming from a Schema Plugin, and nothing else. All the UI for custom fields and post types was missing.
- First I disable thar Schema Plugin, being the only one in the crime scene made it suspectious :), but it didn't work.
- Then I disables ACF, and it make the UI appear.
One thing that could have caused this: before purchasing MB, I tried the free version of it, and of ACF migrate. As CPT where not show, I decided to purchase MB, and instaled it, but after migrating ACF.
Re-runing ACF migration didn't help to solve the problem.
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