Only can add 4 keys? Article says 6.

Thank you for the reply. So I did managed to get a 5th key added.

However, I did not get it added via NFC. That was not work even with latest update. Tried removing passcode on iPhone 14 Pro Max in order to add, but no resolve.

I logged in to my Apple ID via web, and with fingerprint reader on MacBook Pro, and Added the key successfully this way. But it was still wonky this way. I had to press “continue” many times before it promoted to insert the key.

thank you for the replies.

When doing it from my iPhone with latest iOS running (16.5.1 (c)) I get : “an unexpected error has occurred. Please try again later”. There is a “add security key” there and that is the response I get when choosing it and entering the passcode for my device. Once I enter passcode “an unexpected error has occurred”. On my Mac , there is a “+” to add a new security key, when I do this a box appears asking for mac password , and then nothing happens. I click continue but it doesn’t seem to want to do anything. The box looks like it wants to add another key, but I never get promoted for it.

Hi- thank you for replying. I’ve updated to 16.6 and issue is still unresolved. I cannot add a 5th security key. Same error as in the screenshot I captured in earlier reply.