Access denied on register form
Please visit to the permission page- /admin/people/permissions page and scroll down to check menu permissions for administrator and allow the checkbox to create and edit menus, check the checkbox for Administrator menus and menu items. It is checked by default, but in your case you can verify it.
Also I have seen your localhost link has a missing foldername, should be like this-
localhost/foldername/admin/structure/menu/item/8/edit?destination=/admin/structure/menu/manage/account