Fix extras.php 403 error because of dir "extras"

.htaccess

@@ -11,7 +11,9 @@ RewriteCond %{REQEUSTED_FILENAME} !-d
 RewriteCond %{REQUEST_FILENAME}\.html -f
 RewriteRule ^(.*)$ $1.html [NC,L]
 
-DirectorySlash Off
+RewriteCond %{REQUEST_FILENAME} extras/$
+RewriteRule ^(.*)/$ $1 
+
 RewriteCond %{REQUEST_FILENAME}\.php -f
 RewriteRule ^(.*)$ $1.php [NC,L]