If you try to access a topic and the page shows a 404 error you will most likely need to update your permalinks.
WordPress admin menu > Settings > Permalinks > Click save permalinks.
Topic page not showing (404)
#404#error#page
If you try to access a topic and the page shows a 404 error you will most likely need to update your permalinks.
WordPress admin menu > Settings > Permalinks > Click save permalinks.