404 error for portfolio items

After theme update usually appears problem with portfolio items. Users see 404 error. Do not start worrying. You need just to update permalinks following instructions below:

  1. Go Settings -> Permalinks (View screenshot).
  2. Change permalink structure to any you like. Save changes.
  3. Change it back to Post name (or choose structure you like/used before). Save changes.

Now your portfolio items will work correct.