My custom taxonomy page is leading in 404 page

You have to re-save the permalinks when you add or change a custom taxonomy, or a custom post type.

Go to the permalinks settings page, and re-save, then go back and refresh.

Also, you don’t need to specify the slug as instructor if the name is instructor, the rewrite option can be removed or just set to true

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