Could an MC 403 error be caused by a firewall or proxy server?

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Grade: Education Subject: Support
Could an MC 403 error be caused by a firewall or proxy server?
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Yes, a firewall or proxy server could be blocking the app's access to the necessary resources. If you're using a VPN or proxy, try disabling it temporarily to see if that resolves the error. If you're on a corporate network, contact your IT administrator to ensure the app isn't being blocked.