Error: FileMaker Admin API version 1 is not supported with FileMaker Server v19

[databuzz]

I'm getting the following error when trying to login:

{ "errorMessage": "FileMaker Admin API version 1 is not supported. To learn about FileMaker Admin API version 2, see FileMaker Admin API Reference at https://myserver.com/fmi/admin/apidoc", "result": -1 }

I'm using this with FileMaker Server 19.2.1.23.

I tried simply changing the references to fmi/admin/api/v1 to fmi/admin/api/v2 but that results in a different error:

{ "response": {}, "messages": [ { "code": "1700", "text": "Resource doesn't exist" } ] }