Can't create new list in Contacts

Hello Kelly Tuesday,

Thanks for asking about adding lists. Most likely, this is with a third-party contact account. Let's check.

Start here: If your iCloud Contacts, Calendars, or Reminders won’t sync

"Check your default Calendar, Reminders, and Contacts account

If you store and edit your events in iCloud instead of another place, like On My Mac, Exchange, or Google, then iCloud automatically updates your calendars. If you use multiple accounts on your Mac like iCloud, Gmail, and Yahoo, make sure that iCloud is your default Calendar account:

1. Open the Calendar app.
2. Choose Calendar > Settings. In macOS Monterey or earlier, choose Calendar > Preferences.
3. In the General tab, make sure that one of your iCloud calendars is the default.

If you store and edit your contacts in iCloud instead of another place, like On My Mac, Exchange, or Google, then iCloud automatically updates your contacts. If you use multiple accounts on your Mac like iCloud, Gmail, and Yahoo, make sure that iCloud is your default Contacts account:

1. Open the Contacts app.
2. Choose Contacts > Accounts.
3. Click the iCloud tab. Make sure that you're signed in with your Apple ID and that Contacts is enabled."

As long as you've turned on Reminders in iCloud Settings, your iCloud reminders appear on your Mac.

Also check if you have iCloud storage: Manage iCloud storage on Mac

If it's a third-party account, you need to contact the developer for help. Let us know if you still have the issue, if your default account is set to iCloud and you also already have plenty of storage.

Thanks.

Yes, I followed all the steps mentioned above although it appeared all my original setting was all right and at the end when I tried again it miraculously solved my problem of being unable to create new contacts.

Thanks a lot. .