Submitted Form doesn’t send email

Hello,

I’ve been using your extention for 2 years now.
A few days ago it stoped working.
The form doesn’t send email any more (is been working for 2 years)

I’ve put a second email adresse to check out… but still the same 🙁

Version 1.13.17

The page I need help with: [log in to see the link]