Connection refused. No connection could be made because the target machine actively refused it

This error indicates that YAPI Service is not running or is failing to process new incoming connections.  To resolve the problem restart YAPI Service.

A connection attempt failed because the connected party did not properly respond after a period of time

This usually indicates that the firewall is configured to block network traffic. Ensure that the firewall is either disabled, or an exception has been created for the ports that YAPI is using.