I'm getting this error when I try and signin. I can confirm that my info that I am inputting is correct.
https://my.1password.com firstname.lastname@example.org [secret key]
(ERROR) 445: Deprecated API, please update to the latest version.
I downloaded this tool last night so I would assume I have the latest version
1Password Version: 7.2.1
Extension Version: Not Provided
OS Version: OS X 10.14
Sync Type: Not Provided