Email not send after creating a workflow

Hello guys
i have a problem that has been disturbing me and i need some help
I created a workflow that is supposed to send an Email after a certain condition is met.
But after saving my Workflow i still noticed no Email has been sent. Do someone have an idea of where the error come from ?
This is a pic of simple workflow but i don’t receive a Mail
I want to thank you in advance for your help