Validate using the "Machine Info" menu option that you're connecting to the correct machine.
Explicitly type http:// at the beginning of the URL in the location bar when connecting to port 12400, or https:// when connecting to port 12443.
When connecting with HTTPS, ignore the security error, and connect anyway.
It may very well be that your network blocks ports 12400/12443 (which can happen if you're connecting through a corporate VPN or proxy). Try connecting through another network.
Thank you for the prompt response, answers to your suggestions:
Validate using the "Machine Info" menu option that you're connecting to the correct machine.
I did indeed double/triple check.
Explicitly type http:// at the beginning of the URL in the location bar when connecting to port 12400, or https:// when connecting to port 12443.
I did indeed try with both explicit http:// and https:// and relevant ports.
When connecting with HTTPS, ignore the security error, and connect anyway.
There isn't the option to ignore the security warning, in fact no options/buttons at all. The error is a failure, rather than a warning. "Secure Connection Failed"
It may very well be that your network blocks ports 12400/12443 (which can happen if you're connecting through a corporate VPN or proxy). Try connecting through another network.
This may very well be the answer. I am indeed working on a company VPN. I will try on 'home' equipment and confirm if this is the root cause.
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