PlexConnect failed on port 443

Hi friends! I used PlexConnect for some days but now I have this error:

Failed to connect to HTTP on 192.168.0.106 port 443: [Errno 10013] An attempt was made to access a socket in a way forbidden by its access permissions

The only thing I changed is set an fixed IP because other gadget is using ip 192.168.0.106, so I released him and set as fix IP in Windows 10. How can I see who is blocking this port?

Thanks!