I've set up a wiki that is private so users must be logged in to view pages. When clicking the invite link in the email, I am told that I don't have permission to view the account creation page. While leaving $wgGroupPermissions['*']['createaccount'] = false; I've set $wgWhitelistRead = [ "Special:CreateAccount" ]; and now get an error "You do not have permission to do that, for the following reason: You are not allowed to execute the action you have requested."
How can the InviteSignup extension be used on a private wiki? I seem to be missing something. Thank you!