Problem with Model()->find() and Model()->findAll()

Tell us about BaseModel. Does it extend CodeIgniter\Model? What are your namespace statements?

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Model already has $table and $primaryKey properties. Shouldn't your model have a constructor, where it sets those?

Code:

public function __construct() {
  parent::__construct();
  $this->table = 'users';
}

You don't initialize the $DBGroup property, which might affect your outcome.

The docs show assignments to those and other Model properties in the class definition. Since the values are not typically used in a dynamic way there is no reason not to do it that way.