Error: Something went wrong when sending email. Please contact site admin.

Hello,

I have a problem on the UsersWP Plugin when i try to registrer a new user ” Error: Something went wrong when sending email. Please contact site admin. ”

Before to post this message , i tried different solution but without success :
In wp-config.php , i adding these two-lines define(‘WP_DEBUG’, true);
define( ‘WP_DEBUG_LOG’, true );

and In the register form , i have the section ‘ Username ‘ so it’s good .

So could you give me another solution to resolve my problem please ?

Thanks