Fetch only categorized posts

category__not_in is a private query var. This means you can only use it when constructing a query in PHP, not in a url.

You would have to construct your own custom public query var and bind that to a filter that reads the category and then changes the query accordingly.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)