Wordpress frm created by WPForms plugin not sending out e-mail notification

Hi again!

This time I have issues with the contact form. It's set to send notifications to e-mail, but when I tested it, the designated e-mail didn't receive no e-mail at all about the querfy from that form.

I have no idea how this form supposed to work. In theory it provides the possibility to send the notificaton to several e-mails. I set it to send out e-mail to only one and it's not functioning. Support plugin is active.

Thx a lot for help!

Endrik