Custom Registration Form Not Working !

Hi,
I’ve upgraded my theme (using Divi Theme) from 2.4 version 2.6.2 and after that my custom registration form is not working. When clicking on submit button, the page just refreshes and does nothing.
https://summitrug.com/register/

Any advice would help

https://ww.wp.xz.cn/plugins/theme-my-login/