Cannot open console to running instance

Solution Verified - Updated -

Issue

  • Cannot open console to running instance

  • When opening console, at URL like:
    https://servera.example:xxxx/vnc_auto.html?token=xx.xxx
    return error page with content (in Firefox):

The connection to the server was reset while the page was loading.
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

Environment

  • Red Hat OpenStack Platform 9.0
  • Firewall Appliance

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