Multi Language "submit" botton is not working after UPGRADE

Once I create a new form for reservations, if I click the “submbit” botton nothing happen. The related code is: Submit

The error I see in google developer toos is at this point: admin.php?page=reservation-settings&site=form&form=prenotazione_chalet:95

This happen since the upgrade to the latest version I did in this days

I’m running WP 3.8 at http://www.iltimo.it

Thanks for your support.
A-

And what is in line 95 at that point? Are you on beta or 3.3?
Regards