SendGrid Proxy not working

[Clement Yew]

Hi, I've tried the tutorial on using sendgrid api to send emails.
But, after I did all the proxy settings exactly, this error occured.
I've checked twice, all steps are followed correctly. What's the problem?

PS - When i tested hardcoding the api_user and api_key manually, it works.

[Clement Yew]

Ignore this. It's not working from the "Test", but it works from the page.

[Illya Stepanov]

Thanks for the update.