Background: I have developed and managed many WordPress sites over the years. Only one of these sites has this problem, but, based on comments on the WordPress.org forum, others are having the same problem. So far, I have not seen a solution that works.
Problem: Links work with the default setting. This setting does not add a
.htaccess file to the site. The addresses look like
?page_id=12. Permalinks with just the postname also work fine. But permalinks with the category and the postname throw a "Page Cannot Be Found" error.
Plain - default, no .htaccess file created
Day and name - just a radio button choice
Month and name - just a radio button choice
Numeric - just a radio button choice
Post name - this is the equivalent of adding
/%postname%in the 6th option. This one works.
Custom structure - the code I prefer to use is
/%category%/%postname%. This one does not work on this one site. This code does work on all the other sites I have added it to.
- The site is hosted on SiteGround.
- The site is running WordPress 4.6.1
- The site is using the Matheson theme.
- There are only 9 plugins that have been checked for being up-to-date.