Registration Issue/Error

[Ryan Sitzmann]

Hi there,

I recently converted over my forum (forum.idpguru.com)  to a custom subdomain and had nabble enable HTTPS. The forum itself is working as expected and is now encrypted; however, any time someone registers for a new account they get the following error message.



Can you please help me rectify this issue?

Happy to provide any additional information that may be needed to troubleshoot/correct.

Thanks,
Ryan