openModal with v5 returns 404 errors

[quentindecosne]

I'm trying to update livewire-powergrid in my project. I have a table with this method:

public function actions(): array
{
       return [
             Button::make('edit', 'Edit')
                 ->class('btn btn-primary')
                 ->openModal('projects-save', ['project' => 'id']),

             Button::make('destroy', 'Delete')
                 ->class('btn btn-secondary')
                 ->openModal('projects-delete', ['project' => 'id']),
       ];
}

I've changed that to the format in the documentation:

public function actions(): array
{
        return [
            Button::add('edit')
                ->slot('edit')
                ->class('btn btn-primary')
                ->openModal('projects-save', ['project' => 'id']),

            Button::add('destroy')->slot('Delete')
                ->class('btn btn-secondary')
                ->openModal('projects-delete', ['project' => 'id']),
        ];
}

The modal opens but it's a 404, the browser console gives this error:

POST http://tt-admin.test/livewire/update 404 (Not Found)

The modal in blade views using wire-element modal load the correct view.
I'm out of ideas on how to fix this.