I used rest api to get FirstName and LastName of a user field.
The code hasn't been updated for a long time now and it was working fine until last month, but now it doesn't seem to work
Here is the api call
Below is the error that I am getting
-2146232832, Microsoft.SharePoint.SPException Cannot get value for projected field Director_x005f_FirstName.
The expand works fine when I expand Title and EMail fields