Page/Post showing 404 error- WordPress

Sometimes, after the creation of the page/post, the auto-created URL redirects to 404 (page not found).

^{There are some reasons for the causing same.}

• _{Issue in Structure of permalink created.}
• _{Update your permalink settings through the WordPress dashboard. Go to Settings → Permalinks and click Save Changes (you don’t need to make any changes – clicking Save Changes is enough).}

• _{Confirm the landing page slug ( from where the current page is redirecting) in the current page URL.}

• _{Modify the current page slug because there may chance of duplication of the same page slug name.}