#cropPictureImg {
    max-width: 100%; /* This rule is very important, please do not ignore this! */
    width: 100%;
    height: 20vw;
    object-fit: cover;
}

.cropperjs-container {
    /* Never limit the container height here */
    max-width: 100%;
}

.cropperjs-container canvas{
    /* This is important */
    width: 100%;
    height: 320px;
}

figure img{
    /* This is important */
    display: block;
    max-width: 100%;
}