Can't signup for Zoho Workplace/Mail

I cannot get the signup form to submit ( https://workplace.zoho.com/biz/mailsignup.do?plan=free )
Has anyone else experience/reported this?

The form errors out (before even submitting) with this error (possibly on the phone number validation step):
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://accounts.zoho.com/accounts/validate/register.ac. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

And the form itsef throws a HTTP 400 error eventually on this url: https://accounts.zoho.com/accounts/validate/register.ac

>> Server error occurred
>> Looks like you typed an incorrect address or Or the URL you clicked is invalid.

I'd like to signup today but I'm pretty much blocked...