Hi again,

After a fresh install and demo import of the architect one the portfolio item pages show 404 page not found after opening them.

Although the pages are shown in the portfolio grid & I can edit the pages, but for some reason the page shows 404 not found when opening it.
Changing the permalink(s) also didn't fix it.

What could this be?

Oh, for some reason changing the permalink in the salient settings under 'portfolio' seemed to fix it.
You can close this ticket! :)