Why is this Laravel error coming up?

Question

Laravel

Hello everyone, Guys! What does this error mean in Laravel?

InvalidArgumentException in C:\OpenServer\OpenServer\domains\trepia.ru\vendor\laravel\framework\src\Illuminate\Routing\UrlGenerator.php line 603:
Action App\Http\Controllers\[email protected] not defined.

Answer 1

This is because there is no route defined in routes.php for this [email protected] action.
It is necessary to register the route in routes.php to it. Something like
Route::get('/users/activate', '[email protected]')

Answer 2

She means that

Action App\Http\Controllers\[email protected] not defined.