There are no errors in the console.
Tests send everywhere apart from in the Template Editor.
If I want to test a template I am actively working on, I have to first save it then go create a newsletter, select the template, edit email and send a test from there. Its a tedious process
I don't know exactly what you want when you say how I configured my send process. As I said I can send test everywhere, on all tabs in the configuration page, when creating emails e.t.c.
But cannot send test when editing a template.