Troubleshooting WordPress ‘404 Page Not Found’

Solution 1:

It looks like you’ve moved your website to a new server. In this case, you’ll need to update your permalink structure so that WordPress regenerates the .htaccess file.

• Log in to your WordPress admin panel.
• Go to Settings → Permalinks.
• Review your permalink structure (adjust if necessary).
• Click Save Changes to update .htaccess.
• Test your site — it should now work correctly.

Solution 2:
I fixed the issue by setting the correct permissions and uploading an .htaccess file.

Since my server didn’t have an .htaccess file, I created one and uploaded it, following the instructions from this article.