It still not works for me. I cleared the cashe. As I said before you should logout first then test. then it will not work. it is working for loggedin users. Please check below screenshot, the spinner goes on spinning after clicking on submit button. http://prntscr.com/ncdfq1
and here is the console errors http://prntscr.com/ncdgwv
I am again deactivating the plugin so that forms can work.