This is a problem with your .htaccess file.
Correction:
Update to the latest WordPress. Some installations have a permalink error.
Make sure Apache is configured correctly for ModRewrite.
From support: by options> Permalink - This is the "Optional" section. This is not true. After the update, it is mentioned for the index.php / file category (I have PATHINFO permalinks), I donβt want βfilesβ, so I changed it to index.php / Now that I have changed to index.php / _ / (or leave it blank, which gives the standard subpath "Category"), and everything works again. Here is the Rewrite file:
<IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule>
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