Unless you're using a different address than the one in my last post, none of this makes any sense.
If canyouseeme.org gives you an affirmative response to the SS port and your SS site is working locally, then it should be working if you have a valid license installed.
Can you access the site using your external ip and the SS port number? If that works then it's the redirection that is messed up. That, however would make the message you're getting "Status: user.subsonic.org responded successfully." non-sensical.
As complicated as the details can be, the overall steps to get everything working are pretty simple.
Install SS and verify that it works properly on the host machine.
Verify that SS can be accessed from another device on your internal network. If this works, then the host machine's firewall must be open.
Next, make sure your router is forwarding the SS port to the host machine. If Canyouseeme.org says your SS port is open and responding, then you should also be able to connect from outside your network. One caveat I'll put here is that you should let us know if there are any unusual network setups going on that might screw things up. Things like double NAT devices, reverse double proxy servers with all manner of other wierd stuff that isn't the norm. Also, some antivirus programs have been seen to be problematic.
Test external access from outside the network or a cell phone using your cell carriers data connection. You can also get someone outside your network to test for you. First use
http://EXTERNAL_IP_address:SS_portnumber to verify that access is valid, then test the Servername.subsonic.org address to validate that the redirection is working.
That having been reviewed, where are you not getting a connection in the above process?
