About a week or 2 ago, there was no issue with portfolio items. However, upon clicking on them now, they lead to 404 pages. The portfolio items are still there and have not been changed or edited, but even when click to preview them, they lead to 404.
You have only to reset the permalinks. Login into WordPress Dashboard > Settings > Permalinks. Set the Default option click on save. After that you can again change to the old setting and save.
