APi designer

Hi all,
I'm trying to test the API with postman, I followed the needed steps 

The Api server ran on Localhost:8182 but when I send the request from postman I receive this error

Error: connect ECONNREFUSED 127.0.0.1:8182
Arrow forwardRequest Headers
User-AgentPostmanRuntime/7.29.0
Accept*/*
Postman-Tokena2cc22f4-ddee-47eb-8071-3c4c6cb18774
Hostlocalhost:8182
Accept-Encodinggzip, deflate, br
Connectionkeep-alive
 
Can you help me please
Thanks