L.imageOverlay.rotated gives "is Not constructor error"

[zicvic]

When using the lib like stated in the readme (see below), the following error occurs:

const overlay = Leaflet.imageOverlay.rotated("../office.png", topleft, topright, bottomleft, {
        opacity: 0.7,
        interactive: false
    }).addTo(mapRef)

Is it me doing something wrong or is something broken? Leaflet = 1.5.1