If a 403 error appears in your URL, as shown in the example below:
There are three causes of Error 403:
At starting, check files of Your site
Check if the index.php or index.html file is present.
To ensure your website functions correctly, set folder permissions to 755 and file permissions to 644.
If all conditions are met but the 403 error persists, please submit a support ticket through your Client Area.