BadMethodCallException with message 'Call to undefined method App\Models\User::attach()'

[Muhammad Umair Raza]

As the decocumention says

$user->attach(\Spatie\Tags\Tag::findOrCreate('tag4'));

but trying this gives an error

BadMethodCallException with message 'Call to undefined method App\Models\User::attach()'

[Freek Van der Herten]

Try attachTag. Feel free to fix the docs where you saw that (there's an edit button on top of the page).