Unknown column 'preview_url' in 'field list

[bernhardh]

I am using your package and it works on edit screen, but not on index or detail view. I get

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'preview_url' in 'field list' (SQL: update media set updated_at = 2018-09-24 08:45:20, preview_url = http://www.test.local/storage/2030/conversions/amsterdam-panorama-thumb.jpg whereid= 2030)

Image::make('Panorama-Bild', 'panorama')
    ->usingConversion('thumb')
    ->preservingOriginal(),