UPDATE:
It seems this issue was caused by malfunctioning emails (through Google business emails) The admin email (the email that receives registration requests I guess) temporarily stopped functioning (because I had just moved the site from 1 host to anther) After the admin email started working again, the Registration Page came back.
Could be useful to display a different type of message in this situation. For example, blank out the contact form, and write, “CONTACT FORM NOT CURRENTLY CONNECTED” or something. Just a suggestion.
Thank you for prompt reply,
Cheers
Ksen