Attempted to load class "LikeNotificationSubscriber" from namespace "App\EventListener". Did you forget a "use" statement for another namespace?

i have a course for symfony when i want to use a listener on a likes button to send a notification to the user i have this error. on the video he dont have the error it work fine. he use symfony 4.0 but me i use 4.4. thanks in advance :DThis is my Eventlistener 1/2

My EventListener 2/2This is my services.yaml