Well, not exactly (could be be open, but can't be proved and in many cases is closed) ... "Nmap cannot determine whether the port is open because packet filtering prevents its probes from reaching the port. The filtering could be from a dedicated firewall device, router rules, or host-based firewall software."
Could you please try to run the same port scan also from the server to your local host? Thx.
Also please do a quick test with both of anti-virus / firewall disabled to double check if this helps. If it's working I recommend you to configure exceptions once again. Thanks in advance.