Unable to Access Cisco Secure Firewall Management Center Sandbox

Hi everyone, I’m having trouble accessing the Cisco Secure Firewall Management Center Sandbox at: https://fmcrestapisandbox.cisco.com/ui/login When I attempt to log in, I receive the following error message: “Unable to authorize access. If you continue to have difficulty accessing this device, please contact the system administrator.” I am using the credentials assigned to the sandbox environment and have already tried: Clearing browser cache and cookies Using an incognito/private browser session Trying a different browser The issue persists, and I cannot access the FMC UI. Has anyone encounte