DJ-easycontact error "Something went wrong. Please try again." on official demo page and localhost

DJ-easycontact error "Something went wrong. Please try again." on official demo page and localhost

Hello everyone
guys simple question
On DJ-easycontact while send message I received "Something went wrong. Please try again." on official demo page and localhost 

Any ideas?
    Rozszerzenia dla Joomla 4: DJ-MegaMenuDJ-TabsDJ-MediaToolsDJ-ImageSliderDJ-WebP