A 403 error occurs when access to a website, webpage, or resource is blocked. This status code indicates that the server receiving the request has permission issues with the user’s identity or credentials, leading to denied access. The most common reason for this type of error is attempting to visit a page without proper login credentials or being blocked by a firewall or security software.
Source: https://cyberpress.org/phishing-kit-hosted-on-legitimate-cloud-and-cdn-platforms-targeting-microsoft-and-google-users