image_lib doesn't work nor produce any errors!?

Code:
// upload file

if(!$this->upload->do_upload('image')) // if upload fails, process errors

        {

            $file_upload_errors = array('error' => $this->upload->display_errors());

            

            return $file_upload_errors;

        }

        else

        {

            // if it succeeds, get the upload data

            $file = array('upload_data' => $this->upload->data());

    

            // if file exceeds size restrictions

            if($file['upload_data']['image_width'] > 500 || $file['upload_data']['image_height'] > 500)

            {

                // configure image library

                $settings['source_image'] = './uploads/' . $file['upload_data']['file_name'];;

                $settings['maintain_ratio'] = TRUE;

                $settings['width'] = 500

                $settings['height'] = 500



                // load and initialize image library

                $this->load->library('image_lib', $settings);

                $this->image_lib->initialize($settings);

        

                // resize image

                if ( !$this->image_lib->resize())

                {

                     // if resize fails, return errors

                     $file_upload_error = $this->image_lib->display_errors();

                     return $file_upload_error;

                }

            }

            

            

            // return uploaded file data

            return $file;

        }