Today I noticed an update to the project post permalink structure that sits directly below the post title. Where it once read:
with the text before (…) being permanent, it now reads:
https://thegrape.com/food-wine/…
Excited to see this change, my hope was this would be the required fix to remove the 404 error. This does not seem to have fixed the (404 error) problem when using custom permalinks. The posts still show with default permalinks, though.
Thanks for your help.