I created Custom post type using metabox, But I didn't assign category to it yet..
So I get back to Meta Box > Post type to add category ability..
But after I set the category it's show error (screnshot: https://prnt.sc/kokxqf) and all my post are disappear..
Not only the post in custom post type, but all post..
We have updated metabox plugin but it didn't help..