I have a problem with the display of portfolio categories.
I’ve tried creating categories, but I can not access to the category page, and I get a 404 error.
I modified the permalinks but can not solve the problem, what can it be?
The problem occurs only with portfolio categories, while with article categories it’s all normal.
Could you post a link to your portfolio category page? And just to confirm, you changed the permalinks in Settings->Permalinks to ‘post-name’ and it’s still not working, right? If these settings are already set there, it’s still worth saving as WordPress sometimes needs to update the file for it to work correctly.