You will need to review the firewall configuration of the Windows' machine to ensure it accepts remote connections. You can either allow the connections to the port 80 and 443 or allow the connections to the Apache server that is installed in the system.
Apart from that, you can't use "127.0.0.1", that IP means "this machine" and you don't have ReportServer in your system, it's in the Windows machine. You need to use the private IP of the Windows machine when accessing the app from your system.
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