Too few arguments to function \SchemalessAttributes::__construct(), 0 passed

[Khaldi-Anouar]

Too few arguments to function Spatie\SchemalessAttributes\SchemalessAttributes::__construct(), 0 passed in ...\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Concerns\HasAttributes.php on line 1266 and exactly 2 expected

[Kessir]

I'm having the same issue on Laravel 8, PHP8.
For now, I have reverted to the old way of setting up:
public $casts = [ 'extra' => 'array' ];

[Crowly34]

@Kessir @Khaldi-Anouar Issue for me here was that I was doing use Spatie\SchemalessAttributes\SchemalessAttributes in the casting where I should be using use Spatie\SchemalessAttributes\Casts\SchemalessAttributes; like the docs say hope this works for you.