Registration Issue

We are developing a couple of sites in tandem, both membership sites using v9.2.8.

However, on one of the sites you cannot register, it goes to this URL (/register/do_register) and nothing else happens, no user is registered etc.

The other site works fine and goes to the correct URL and shows the confirmation message.

I seem to have all the same options on both sites selected in the Dashboard for Registration, anyone can register, no captcha, ask for email and password and username not required.

Any idea what the issue could be please?

Do the sites use different themes?

Both are based on our own theme, we haven’t got an override for the register page, both Login Destinations set to Home page.

Seems its a local issue my colleague has no trouble registering on his computer