Logs for help, without connection

Hello everyone!
I’ve been trying to use Postman app (the check for updates says “You are up to date! Postman v7.0.9 is the latest version.”), it seems that has connection but when I’m running a single request whith GET http://jsonplaceholder.typicode.com/users
never responds me.
My proxy is with “use system proxy” . I’ve reviewed that is not a common Program files installation, it installed in user/Temp or something like that , so What logs can I review?

Thanks in advance