Casting doesn't work for me

[tooshay]

I'm in the process of setting up a states in a new API. Laravel 11, laravel-model-states 2.7.

For whatever reason the abstract state class isn't recognised in the casts method:
"Call to undefined cast [app\EvSessions\StateMachine\States\EvSessionState] on column [state] in model [App\EvSessions\Models\EvSession]."

In App\EvSessions\Models\EvSession:

use app\EvSessions\StateMachine\States\EvSessionState;
protected function casts(): array
    {
        return [
             //...
            'state' => EvSessionState::class,
            //...
        ];
    }

In App\EvSessions\StateMachine\States\EvSessionState:

use Spatie\ModelStates\State;
use Spatie\ModelStates\StateConfig;

abstract class EvSessionState extends State
{
    public static function config(): StateConfig
    {
        return parent::config()
            ->default(Created::class)
            ->allowAllTransitions();
    }
} 

What am I missing? I've tried digging into HasAttributes and it seems like it's failing at:

get_class(app\EvSessions\StateMachine\States\EvSessionState)

[tooshay]

I'm an idiot. composer du to the rescue!