Why am I getting "Access Denied"?
If your screenshot shows an "Access Denied" page, this means that the target site has a WAF (web application firewall) blocking crawlers. The solution is to Whitelist Stillio IP addresses which requires administrative control of that site. Alternatively, your firewall may also grant us access based on a custom user agent or cookie value (both are in the Advanced settings).
A workaround can be to choose a different country with the Location chip on the Basics tab of your webpage settings. This will use different IP addresses than the main pool of IP's from the Data Center that runs our screenshot engine. If screenshots from other Locations also get blocked, it's probably because all types of data center IP addresses aren't allowed to access the site. The best chance to bypass such firewalls is to use a proxy server/service that is not related to a data center. If you have a third-party proxy service subscription, we can integrate this in your account. Contact us for details and pricing.