I upgraded today to the latest version
I lost all my categories. I did not save a backup.
I can see my tags on my tag page in the admin area, but all categories are gone.
On my post edit page I can see no categories. The field is blank.
I checked the database and all categories are there. when I add a new category from admin panel, they are successfully written in the database, but then when I refresh the admin area the newly created category is gone.
I downgraded and then deleted the Edit Flow plugin. Nothing changed.
WHAT TO DO?