Please Enable JavaScript

Getting error Forbidden Please Enable JavaScript on chrome, firefox, and edge when trying to register a new member. Deactivating plugin clears error. I have read the kb https://cleantalk.org/help/forbidden-please-enable-javascript

Steps to recreate.

1. go to refrenced page
2. try to register new member
3. get listed error

Next steps?

Thank you

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