What am I doing wrong with my taxonomy?

Now that you’ve made the custom taxonomy (and slug), you probably need to ‘reindex’ so to speak. Go to your WordPress Admin > Settings > Permalinks and make a change (make note of your original setting). Save, then change back to the original setting and save again.

Your url new taxonomy should work then.

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