CB InvitesCB Invites defaults to NULL when registering

Hi there!

I got CB Invites set up and it works fine when someone with an invite code clicks on the link in their mail - they get referred to the registration page and their invite code gets populated in the relevant field.

However...

When someone _without_ an invite code clicks on the "Sign up" link, they are directed to index.php/cb-registration where the CB invite code field is pre-populated with "null".

Unless a user deletes this "null" entry, when they submit the form it returns an error:
Error
Your Invite Code : Invite code not valid.

I do not want to put a note asking people signing up to delete the 'null' entry, so wondering how I can get around this?
Any guidance much appreciated.

Thanks,
Chris.

I'm seeing no such issues in my test. Edit the invite_code field in CB > Field Management and ensure "Default Registration Value" is empty.