How to Fix 404 Errors

If single projects or portfolio category pages return a 404 Not Found, it’s almost always one of three things — all quick to fix.

1. Flush the permalinks

Go to Settings → Permalinks and simply click Save Changes (no need to change anything). WordPress rebuilds its URL rules, which fixes most 404s right after installing the plugin or changing the portfolio slugs.

2. Check for slug conflicts

The portfolio URLs use two slugs — by default /project/… for single items and /portfolio/… for categories (Portfolio → Settings). If a page on your site uses the same slug (a page named “Portfolio” is the classic case), one of the two must change: rename the page’s slug, or change the plugin’s slug and flush permalinks again. Details: Portfolio Settings & Permalinks.

3. Disable other portfolio plugins/features

Two plugins registering a “portfolio” post type conflict with each other:

• Jetpack — its Custom content types feature includes a Portfolio post type; turn it off in Jetpack’s settings (search for “Portfolio”).
• Other portfolio plugins or theme features that add their own portfolio post type — deactivate the duplicates, keep one.

Still stuck?

• A Photo Proofing gallery link (PRO) returns 404 by design when the ?key=… part is missing or the link was regenerated — copy the current Client Link from the gallery’s edit screen.
• Try the default permalink structure once (Settings → Permalinks → Plain, save, then back to Post name, save) to force a full rebuild.
• Still not working? Contact our support team.