A 403 error means the server understood your request but is deliberately refusing to fulfill it — distinct from a 404, where the resource simply doesn't exist.
Incorrect File Permissions
Files or folders with overly restrictive permissions are one of the most common causes — verify standard settings (644 for files, 755 for folders).
Missing Index File
A directory without an index.php or index.html file, and without directory listing enabled, returns a 403 by design in many server configurations.
.htaccess Restrictions
Check for explicit deny rules in .htaccess that might be blocking access unintentionally, especially after a recent edit.
IP Blocking
Security plugins or server-level firewalls sometimes block specific IPs — worth checking if you're seeing this error only from certain locations or devices.
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