?taxonomy_name=slug shows both posts and pages

I think you were trying to use

mysite.com/tag/tag_slug  

ie damien.co/tag/wordpress

You can try to use ?s= (search) and ?t= (tag) as URL parameters

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