Problems with pagination

Hello,

I have been trying to figure out how to set up pagination. I've read the documentation several times, but can't understand why it is not working. It should be simple from my understanding.

This is the error I'm receiving

PHP Code:

Argument 1 passed to CodeIgniter\Database\BaseResult::getResult() must be of the type string, null given, called in 


This is my controller at the moment:

PHP Code:

  public function my_listings() {
        $jobs = new \App\Models\Jobs();

        if (!$this->ionAuth->loggedIn())
        {
            return redirect()->to('/logg-inn');
        }

        $this->meta =
            (object)array(
                'site_name' => 'Lynt',
                'title' => 'Innstillinger',
                'description' => 'test',
            );

        $data = ([
            'meta' => $this->meta,
            'uri' => $this->uri,
            'session' => $this->session,
            'ionAuth' => $this->ionAuth,
            'validation' => $this->validator,
            'jobs' => $jobs->paginate(10)->get_users_jobs(),
            'pager' => $jobs->pager()->get_users_jobs(),

        ]);


        echo view("moonlanding/header_moonlanding", $data);
        echo view("moonlanding/userhome/my_listings", $data);
        echo view("moonlanding/footer_moonlanding", $data);

    } 


And my model:

PHP Code:

    public function get_users_jobs() {
        $this->categories = new \App\Models\Categories();
        $builder = $this->db->table('jobs');
        $builder->select('*')
                ->join('users', 'users.id = jobs.jobs_u_id')
                ->join('categories', 'category_id = jobs.jobs_category')
                ->where('jobs_u_id =', $this->current_user->id);
        $builder->orderBy('jobs_id', 'desc');
        $query = $builder->get();
        if ($builder->countAllResults() > 0)
        {
            return $query;

        } else {
            return false;
        }
    } 


It is working perfectly before trying to mess it up with adding the pagination. I appreciate any help on this.