Twig\Error\RuntimeError

Line 1 of /var/www/vhosts/musikschule-bregenzerwald.at/site/templates/images/image-full-width-crop.html.twig

Impossible to invoke a method ("crop") on a null variable.

{% set iDefault = i.crop('650', '430', option('image.quality_low')) %}
<img
    sizes="(min-width: 68.75em) 650px, (min-width: 56.25em) 50vw, 95vw"
    srcset="
                    {{ i.crop('650', '430', option('image.quality_height')).url() }} 650w,
                    {{ i.crop('900', '595', option('image.quality_low')).url() }} 900w,
                    {{ i.crop('1100', '728', option('image.quality_low')).url() }} 1100w,