Forms not sending??

Hi i don't get what is happening, the form on this page is not sending emails?
https://migrate.rodriguemontpetitfils.com/index.php/fr/?option=com_sppagebuilder&view=page&id=15
the php mailer in joomla works fine when i test that. The contact form module itself also works fine but the form builder refuses to send anyting, I get a message saying that i have to fill all the required fields... but they are all filled!?