Bu kodu htaccess dosyanıza ekleyin sorun çözülecektir.

Options +FollowSymlinks
Options -Indexes
<FilesMatch "(?i)((\.tpl|\.ini|\.log|(?<!robots)\.txt))">
 Require all denied
</FilesMatch>
RewriteEngine On
RewriteBase /
RewriteRule ^sitemap.xml$ index.php?route=extension/feed/google_sitemap [L]
RewriteRule ^googlebase.xml$ index.php?route=extension/feed/google_base [L]
RewriteRule ^system/download/(.*) index.php?route=error/not_found [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]