Form does not send email nor entries

I spent pretty much time to configure and reconfigure the form and there is no way I can make it work. No entry, no mail sent and I did long-figure recipients and so on as seen in the documentation.
No message is displayed when sent, nothin i,serted in entries… the only thing I can mention is that a “#jqjksgmqjmr…” is apend to the url when I click the submit button. I do not understand how to debug this.

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