Xcode 11 doesn't recognize Core data Entity

Question

I just declared an entity called \"Users\" array:

var UsersArray = [Users]()

I got this error:

use of unresolved id

Answer 1

Other possible solutions:

(A) Re-launch Xcode

This is the solution that worked for me.

(B) Check if you did not forget to finalize your entity description

Typically: forgot to assign a type to one of the attributes (still "undefined").

(C) Clear derived data

Reason: The generated core data managed objects subclasses's source code files are in the project’s derived data location. Note: you might have to re-link your swift packages is using SPM.