404 Error – Vacancies not showing on Front End view
Job vacancies appearing in the front end screens can need a Permalink reset to be set up correctly when you add or re-install the plugin.
You have to set permalinks to “Post Name”.
You can find the permalink settings on WP Dashboard → Settings → Permalinks.
If you already have the permalink set to Post Name then you just need to click the Save button to flush the rewrite rule.